Merge pull request #882 from xmake-io/fortran

Add gfortran compiler support

40 files changed, 717 insertions, 46 deletions

diff --git a/.gitignore b/.gitignore
index 00aa14163..955e049f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,4 +31,7 @@ winenv/
 /core/**/*.b
 /core/**/*.a
 
+# for fortran
+/tests/**/*.mod
+
 !/xmake/actions/build/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 138eb83a5..3f49dba9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### New features
 
 * Add `xmake project -k xcode` generator (use cmake)
+* [870](https://github.com/xmake-io/xmake/issues/870): Support gfortran compiler
 
 ## v2.3.5
 
@@ -778,6 +779,7 @@
 ### 新特性
 
 * 添加xcode工程生成器插件，`xmake project -k cmake` （当前采用cmake生成）
+* [870](https://github.com/xmake-io/xmake/issues/870): 支持gfortran编译器
 
 ## v2.3.5
 
diff --git a/README.md b/README.md
index 6228f1194..ad9bc5d37 100644
--- a/README.md
+++ b/README.md
@@ -181,6 +181,7 @@ yasm          The Yasm Modular Assembler
 clang         A C language family frontend for LLVM
 go            Go Programming Language Compiler
 dlang         D Programming Language Compiler
+gfortran      GNU Fortran Programming Language Compiler
 sdcc          Small Device C Compiler
 cuda          CUDA Toolkit
 ndk           Android NDK
@@ -205,6 +206,7 @@ fasm          Flat Assembler
 * Golang
 * Rust
 * Dlang
+* Fortran
 * Cuda
 
 ## Supported Projects
diff --git a/README_zh.md b/README_zh.md
index 92d020101..18b0c2d31 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -188,6 +188,7 @@ yasm          The Yasm Modular Assembler
 clang         A C language family frontend for LLVM
 go            Go Programming Language Compiler
 dlang         D Programming Language Compiler
+gfortran      GNU Fortran Programming Language Compiler
 sdcc          Small Device C Compiler
 cuda          CUDA Toolkit
 ndk           Android NDK
@@ -211,6 +212,7 @@ fasm          Flat Assembler
 * Golang
 * Rust
 * Dlang
+* Fortran
 * Cuda
 
 ## 工程类型
diff --git a/tests/projects/c++/console/xmake.lua b/tests/projects/c++/console/xmake.lua
index 9ab7f42ca..35b9bde70 100644
--- a/tests/projects/c++/console/xmake.lua
+++ b/tests/projects/c++/console/xmake.lua
@@ -1,12 +1,5 @@
--- add rules
 add_rules("mode.debug", "mode.release")
-
--- add target
-target("console_c++")
-
-    -- set kind
+target("test")
     set_kind("binary")
-
-    -- add files
     add_files("src/*.cpp")
 
diff --git a/tests/projects/c/console/xmake.lua b/tests/projects/c/console/xmake.lua
index 547d0f101..405285a8f 100644
--- a/tests/projects/c/console/xmake.lua
+++ b/tests/projects/c/console/xmake.lua
@@ -1,13 +1,5 @@
-
--- add modes: debug and release
 add_rules("mode.debug", "mode.release")
-
--- add target
-target("console_c")
-
-    -- set kind
+target("test")
     set_kind("binary")
-
-    -- add files
     add_files("src/*.c")
 
diff --git a/tests/projects/fortran/console/src/main.f90 b/tests/projects/fortran/console/src/main.f90
new file mode 100644
index 000000000..a332e8401
--- /dev/null
+++ b/tests/projects/fortran/console/src/main.f90
@@ -0,0 +1,3 @@
+program hello
+  print *, "Hello World!"
+end program hello
diff --git a/tests/projects/fortran/console/xmake.lua b/tests/projects/fortran/console/xmake.lua
new file mode 100644
index 000000000..ae05d38d1
--- /dev/null
+++ b/tests/projects/fortran/console/xmake.lua
@@ -0,0 +1,6 @@
+add_rules("mode.debug", "mode.release")
+
+target("test")
+    set_kind("binary")
+    add_files("src/*.f90")
+
diff --git a/tests/projects/fortran/shared_library/src/main.f90 b/tests/projects/fortran/shared_library/src/main.f90
new file mode 100644
index 000000000..9adea3e26
--- /dev/null
+++ b/tests/projects/fortran/shared_library/src/main.f90
@@ -0,0 +1,5 @@
+program hello
+    use test, only: print_hello
+    implicit none (type, external)
+    call print_hello()
+end program hello
diff --git a/tests/projects/fortran/shared_library/src/test.f90 b/tests/projects/fortran/shared_library/src/test.f90
new file mode 100644
index 000000000..b1e97a36c
--- /dev/null
+++ b/tests/projects/fortran/shared_library/src/test.f90
@@ -0,0 +1,8 @@
+module test
+    implicit none (type, external)
+    
+contains
+    subroutine print_hello()
+        print *, "Hello World!"
+    end subroutine print_hello
+end module test
diff --git a/tests/projects/fortran/shared_library/xmake.lua b/tests/projects/fortran/shared_library/xmake.lua
new file mode 100644
index 000000000..7bc4e77f1
--- /dev/null
+++ b/tests/projects/fortran/shared_library/xmake.lua
@@ -0,0 +1,11 @@
+add_rules("mode.debug", "mode.release")
+
+target("testlib")
+    set_kind("shared")
+    add_files("src/test.f90")
+
+target("test")
+    set_kind("binary")
+    add_deps("testlib")
+    add_files("src/main.f90")
+
diff --git a/tests/projects/fortran/static_library/src/main.f90 b/tests/projects/fortran/static_library/src/main.f90
new file mode 100644
index 000000000..9adea3e26
--- /dev/null
+++ b/tests/projects/fortran/static_library/src/main.f90
@@ -0,0 +1,5 @@
+program hello
+    use test, only: print_hello
+    implicit none (type, external)
+    call print_hello()
+end program hello
diff --git a/tests/projects/fortran/static_library/src/test.f90 b/tests/projects/fortran/static_library/src/test.f90
new file mode 100644
index 000000000..b1e97a36c
--- /dev/null
+++ b/tests/projects/fortran/static_library/src/test.f90
@@ -0,0 +1,8 @@
+module test
+    implicit none (type, external)
+    
+contains
+    subroutine print_hello()
+        print *, "Hello World!"
+    end subroutine print_hello
+end module test
diff --git a/tests/projects/fortran/static_library/xmake.lua b/tests/projects/fortran/static_library/xmake.lua
new file mode 100644
index 000000000..694755de5
--- /dev/null
+++ b/tests/projects/fortran/static_library/xmake.lua
@@ -0,0 +1,11 @@
+add_rules("mode.debug", "mode.release")
+
+target("testlib")
+    set_kind("static")
+    add_files("src/test.f90")
+
+target("test")
+    set_kind("binary")
+    add_deps("testlib")
+    add_files("src/main.f90")
+
diff --git a/xmake/languages/fortran/api.lua b/xmake/languages/fortran/api.lua
new file mode 100644
index 000000000..53724dd2a
--- /dev/null
+++ b/xmake/languages/fortran/api.lua
@@ -0,0 +1,78 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        api.lua
+--
+
+-- get apis
+function apis()
+
+    -- init apis
+    _g.values = 
+    {
+        -- target.add_xxx
+        "target.add_links"
+    ,   "target.add_syslinks"
+    ,   "target.add_dcflags"
+    ,   "target.add_ldflags"
+    ,   "target.add_arflags"
+    ,   "target.add_shflags"
+    ,   "target.add_rpathdirs"  -- @note do not translate path, it's usually an absolute path or contains $ORIGIN/@loader_path
+        -- option.add_xxx
+    ,   "option.add_links"
+    ,   "option.add_syslinks"
+    ,   "option.add_dcflags"
+    ,   "option.add_ldflags"
+    ,   "option.add_arflags"
+    ,   "option.add_shflags"
+    ,   "option.add_rpathdirs"
+        -- package.add_xxx
+    ,   "package.add_links"
+    ,   "package.add_syslinks"
+    ,   "package.add_dcflags"
+    ,   "package.add_ldflags"
+    ,   "package.add_arflags"
+    ,   "package.add_shflags"
+    ,   "package.add_rpathdirs"
+    ,   "package.add_linkdirs"
+    ,   "package.add_includedirs"
+        -- toolchain.add_xxx
+    ,   "toolchain.add_links"
+    ,   "toolchain.add_syslinks"
+    ,   "toolchain.add_dcflags"
+    ,   "toolchain.add_ldflags"
+    ,   "toolchain.add_arflags"
+    ,   "toolchain.add_shflags"
+    ,   "toolchain.add_rpathdirs"
+    ,   "toolchain.add_linkdirs"
+    ,   "toolchain.add_includedirs"
+    }
+    _g.pathes = 
+    {
+        -- target.add_xxx
+        "target.add_linkdirs"
+    ,   "target.add_includedirs"
+        -- option.add_xxx
+    ,   "option.add_linkdirs"
+    ,   "option.add_includedirs"
+    }
+
+    -- ok
+    return _g
+end
+
+
diff --git a/xmake/languages/fortran/check_main.lua b/xmake/languages/fortran/check_main.lua
new file mode 100644
index 000000000..6df61c763
--- /dev/null
+++ b/xmake/languages/fortran/check_main.lua
@@ -0,0 +1,39 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        check_main.lua
+--
+
+-- check it
+function main(sourcefile)
+
+    -- load source code
+    local sourcecode = io.readfile(sourcefile)
+
+    -- remove comment first
+    sourcecode = sourcecode:gsub("!.-\n", "\n")
+
+    -- find 'program xxx'
+    if sourcecode:find("program%s*%(.-%)") then
+        return true
+    end
+
+    -- no main function
+    return false
+end
+
+
diff --git a/xmake/languages/fortran/load.lua b/xmake/languages/fortran/load.lua
new file mode 100644
index 000000000..400376028
--- /dev/null
+++ b/xmake/languages/fortran/load.lua
@@ -0,0 +1,34 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        load.lua
+--
+
+-- imports
+import("api")
+
+-- load it
+function main()
+
+    -- init apis
+    _g.apis = api.apis()
+
+    -- ok
+    return _g
+end
+
+
diff --git a/xmake/languages/fortran/xmake.lua b/xmake/languages/fortran/xmake.lua
new file mode 100644
index 000000000..fb17f6f6b
--- /dev/null
+++ b/xmake/languages/fortran/xmake.lua
@@ -0,0 +1,126 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        xmake.lua
+--
+
+-- define language
+language("fortran")
+
+    -- set source file kinds
+    set_sourcekinds {fc = {".f03", ".f90", ".f95", ".for", ".f"}}
+
+    -- set source file flags
+    set_sourceflags {fc = "fcflags"}
+
+    -- set target kinds
+    set_targetkinds {binary = "fcld", static = "ar", shared = "fcsh"}
+
+    -- set target flags
+    set_targetflags {binary = "ldflags", static = "arflags", shared = "shflags"}
+
+    -- set language kinds
+    set_langkinds {fortran = "fc"}
+
+    -- set mixing kinds
+    set_mixingkinds("fc", "cc", "cxx", "as")
+
+    -- add rules
+    add_rules("fortran")
+
+    -- on load
+    on_load("load")
+
+    -- on check_main
+    on_check_main("check_main")
+
+    -- set name flags
+    set_nameflags 
+    {
+        object =
+        {
+            "config.includedirs"
+        ,   "target.symbols"
+        ,   "target.warnings"
+        ,   "target.optimize:check"
+        ,   "target.vectorexts:check"
+        ,   "target.includedirs"
+        ,   "toolchain.includedirs"
+        }
+    ,   binary =
+        {
+            "config.linkdirs"
+        ,   "target.linkdirs"
+        ,   "target.rpathdirs"
+        ,   "target.strip"
+        ,   "target.symbols"
+        ,   "option.linkdirs"
+        ,   "option.rpathdirs"
+        ,   "toolchain.linkdirs"
+        ,   "toolchain.rpathdirs"
+        ,   "config.links"
+        ,   "target.links"
+        ,   "option.links"
+        ,   "toolchain.links"
+        ,   "config.syslinks"
+        ,   "target.syslinks"
+        ,   "option.syslinks"
+        ,   "toolchain.syslinks"
+        }
+    ,   shared =
+        {
+            "config.linkdirs"
+        ,   "target.linkdirs"
+        ,   "target.strip"
+        ,   "target.symbols"
+        ,   "option.linkdirs"
+        ,   "toolchain.linkdirs"
+        ,   "config.links"
+        ,   "target.links"
+        ,   "option.links"
+        ,   "toolchain.links"
+        ,   "config.syslinks"
+        ,   "target.syslinks"
+        ,   "option.syslinks"
+        ,   "toolchain.syslinks"
+        }
+    ,   static = 
+        {
+            "target.strip"
+        ,   "target.symbols"
+        }
+    }
+
+    -- set menu
+    set_menu {
+                config = 
+                {   
+                    {category = "Cross Complation Configuration/Compiler Configuration"          }
+                ,   {nil, "fc",         "kv", nil,          "The Fortran Compiler"               }
+
+                ,   {category = "Cross Complation Configuration/Linker Configuration"            }
+                ,   {nil, "fcld",       "kv", nil,          "The Fortran Linker"                 }
+                ,   {nil, "fcsh",       "kv", nil,          "The Fortran Shared Library Linker"  }
+
+                ,   {category = "Cross Complation Configuration/Builtin Flags Configuration"     }
+                ,   {nil, "links",      "kv", nil,          "The Link Libraries"                 }
+                ,   {nil, "syslinks",   "kv", nil,          "The System Link Libraries"          }
+                ,   {nil, "linkdirs",   "kv", nil,          "The Link Search Directories"        }
+                ,   {nil, "includedirs","kv", nil,          "The Include Search Directories"     }
+                }
+            } 
+
diff --git a/xmake/modules/core/tools/dmd.lua b/xmake/modules/core/tools/dmd.lua
index 378c68642..2d8fe8f44 100644
--- a/xmake/modules/core/tools/dmd.lua
+++ b/xmake/modules/core/tools/dmd.lua
@@ -38,8 +38,6 @@ end
 
 -- make the optimize flag
 function nf_optimize(self, level)
-
-    -- the maps
     local maps = 
     {   
         fast        = "-O"
@@ -48,42 +46,30 @@ function nf_optimize(self, level)
     ,   smallest    = "-O -release -boundscheck=off"
     ,   aggressive  = "-O -release -inline -boundscheck=off"
     }
-
-    -- make it
     return maps[level] 
 end
 
 -- make the strip flag
 function nf_strip(self, level)
-
-    -- the maps
     local maps = 
     {   
         debug       = "-L-S"
     ,   all         = "-L-s"
     }
-
-    -- make it
     return maps[level] 
 end
 
 -- make the symbol flag
 function nf_symbol(self, level)
-
-    -- the maps
     local maps = 
     {   
         debug = "-g -debug"
     }
-
-    -- make it
     return maps[level] 
 end
 
 -- make the warning flag
 function nf_warning(self, level)
-
-    -- the maps
     local maps = 
     {   
         none        = "-d"
@@ -93,22 +79,16 @@ function nf_warning(self, level)
     ,   everything  = "-w -wi"
     ,   error       = "-de"
     }
-
-    -- make it
     return maps[level]
 end
 
 -- make the vector extension flag
 function nf_vectorext(self, extension)
-
-    -- the maps
     local maps = 
     {   
         avx         = "-mcpu=avx"
     ,   avx2        = "-mcpu=avx"
     }
-
-    -- make it
     return maps[extension] 
 end
 
@@ -171,17 +151,17 @@ function link(self, objectfiles, targetkind, targetfile, flags)
 end
 
 -- make the compile arguments list
-function compargv(self, sourcefiles, objectfile, flags)
-    return self:program(), table.join("-c", flags, "-of" .. objectfile, sourcefiles)
+function compargv(self, sourcefile, objectfile, flags)
+    return self:program(), table.join("-c", flags, "-of" .. objectfile, sourcefile)
 end
 
 -- compile the source file
-function compile(self, sourcefiles, objectfile, dependinfo, flags)
+function compile(self, sourcefile, objectfile, dependinfo, flags)
 
     -- ensure the object directory
     os.mkdir(path.directory(objectfile))
 
     -- compile it
-    os.runv(compargv(self, sourcefiles, objectfile, flags))
+    os.runv(compargv(self, sourcefile, objectfile, flags))
 end
 
diff --git a/xmake/modules/core/tools/gfortran.lua b/xmake/modules/core/tools/gfortran.lua
new file mode 100644
index 000000000..aab8848ac
--- /dev/null
+++ b/xmake/modules/core/tools/gfortran.lua
@@ -0,0 +1,38 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        gfortran.lua
+--
+
+-- inherit gcc
+inherit("gcc")
+
+-- init it
+function init(self)
+
+    -- init super
+    _super.init(self)
+
+    -- init shflags
+    self:set("fcshflags", "-shared")
+
+    -- add -fPIC for shared
+    if not is_plat("windows", "mingw") then
+        self:add("fcshflags", "-fPIC")
+        self:add("shared.fcflags", "-fPIC")
+    end
+end
diff --git a/xmake/modules/detect/tools/find_gfortran.lua b/xmake/modules/detect/tools/find_gfortran.lua
new file mode 100644
index 000000000..12122abdf
--- /dev/null
+++ b/xmake/modules/detect/tools/find_gfortran.lua
@@ -0,0 +1,57 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        find_gfortran.lua
+--
+
+-- imports
+import("lib.detect.find_program")
+import("lib.detect.find_programver")
+
+-- find gfortran 
+--
+-- @param opt   the argument options, e.g. {version = true}
+--
+-- @return      program, version
+--
+-- @code 
+--
+-- local gfortran = find_gfortran()
+-- local gfortran, version = find_gfortran({program = "g95", version = true})
+-- 
+-- @endcode
+--
+function main(opt)
+
+    -- init options
+    opt = opt or {}
+    
+    -- find program
+    local program = find_program(opt.program or "gfortran", opt)
+    if not program then
+        program = find_program("g95", opt)
+    end
+
+    -- find program version
+    local version = nil
+    if program and opt and opt.version then
+        version = find_programver(program, opt)
+    end
+
+    -- ok?
+    return program, version
+end
diff --git a/xmake/modules/detect/tools/gfortran/has_flags.lua b/xmake/modules/detect/tools/gfortran/has_flags.lua
new file mode 100644
index 000000000..5f209a3fc
--- /dev/null
+++ b/xmake/modules/detect/tools/gfortran/has_flags.lua
@@ -0,0 +1,122 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        has_flags.lua
+--
+
+-- imports
+import("lib.detect.cache")
+import("core.language.language")
+
+-- is linker?
+function _islinker(flags, opt)
+  
+    -- the flags is "-Wl,<arg>" or "-Xlinker <arg>"?
+    local flags_str = table.concat(flags, " ")
+    if flags_str:startswith("-Wl,") or flags_str:startswith("-Xlinker ") then
+        return true
+    end
+
+    -- the tool kind is ld or sh?
+    local toolkind = opt.toolkind or ""
+    return toolkind == "ld" or toolkind == "sh" or toolkind:endswith("-ld") or toolkind:endswith("-sh")
+end
+
+-- try running 
+function _try_running(program, argv, opt)
+    local errors = nil
+    return try { function () os.runv(program, argv, opt); return true end, catch { function (errs) errors = (errs or ""):trim() end }}, errors
+end
+
+-- attempt to check it from the argument list
+function _check_from_arglist(flags, opt, islinker)
+
+    -- only for compiler
+    if islinker or #flags > 1 then
+        return 
+    end
+
+    -- make cache key
+    local key = "detect.tools.gfortran.has_flags"
+
+    -- make flags key
+    local flagskey = opt.program .. "_" .. (opt.programver or "")
+
+    -- load cache
+    local cacheinfo  = cache.load(key)
+
+    -- get all flags from argument list
+    local allflags = cacheinfo[flagskey]
+    if not allflags then
+
+        -- get argument list
+        allflags = {}
+        local arglist = os.iorunv(opt.program, {"--help"}, {envs = opt.envs})
+        if arglist then
+            for arg in arglist:gmatch("%s+(%-[%-%a%d]+)%s+") do
+                allflags[arg] = true
+            end
+        end
+
+        -- save cache
+        cacheinfo[flagskey] = allflags
+        cache.save(key, cacheinfo)
+    end
+
+    -- ok?
+    return allflags[flags[1]]
+end
+
+-- try running to check flags
+function _check_try_running(flags, opt, islinker)
+
+    -- make an stub source file
+    local sourcefile = path.join(os.tmpdir(), "detect", "gfortran_has_flags.f90")
+    if not os.isfile(sourcefile) then
+        io.writefile(sourcefile, "program hello\n  print *, \"Hello World!\"\nend program hello")
+    end
+
+    -- check flags for linker
+    if islinker then
+        return _try_running(opt.program, table.join(flags, "-o", os.tmpfile(), sourcefile), opt)
+    end
+
+    -- check flags for compiler
+    -- @note we cannot use os.nuldev() as the output file, maybe run failed for some flags, e.g. --coverage
+    return _try_running(opt.program, table.join(flags, "-S", "-o", os.tmpfile(), sourcefile), opt)
+end
+
+-- has_flags(flags)?
+-- 
+-- @param opt   the argument options, e.g. {toolname = "", program = "", programver = "", toolkind = "[cc|cxx|ld|ar|sh|gc|mm|mxx]"}
+--
+-- @return      true or false
+--
+function main(flags, opt)
+
+    -- is linker?
+    local islinker = _islinker(flags, opt)
+
+    -- attempt to check it from the argument list
+    if _check_from_arglist(flags, opt, islinker) then
+        return true
+    end
+
+    -- try running to check it
+    return _check_try_running(flags, opt, islinker)
+end
+
diff --git a/xmake/platforms/cygwin/xmake.lua b/xmake/platforms/cygwin/xmake.lua
index deca581bc..76f841a33 100644
--- a/xmake/platforms/cygwin/xmake.lua
+++ b/xmake/platforms/cygwin/xmake.lua
@@ -51,5 +51,5 @@ platform("cygwin")
     end)
 
     -- set toolchains
-    set_toolchains("envs", "cross", "gcc", "clang", "yasm")
+    set_toolchains("envs", "cross", "gcc", "clang", "yasm", "gfortran")
 
diff --git a/xmake/platforms/linux/xmake.lua b/xmake/platforms/linux/xmake.lua
index a1097565b..874bcac7c 100644
--- a/xmake/platforms/linux/xmake.lua
+++ b/xmake/platforms/linux/xmake.lua
@@ -50,7 +50,7 @@ platform("linux")
     end)
 
     -- set toolchains
-    set_toolchains("envs", "cross", "gcc", "clang", "yasm", "nasm", "fasm", "cuda", "dlang", "go", "rust")
+    set_toolchains("envs", "cross", "gcc", "clang", "yasm", "nasm", "fasm", "cuda", "dlang", "go", "rust", "gfortran")
 
     -- set menu
     set_menu {
diff --git a/xmake/platforms/macosx/xmake.lua b/xmake/platforms/macosx/xmake.lua
index f643d2c80..9df9aaab2 100644
--- a/xmake/platforms/macosx/xmake.lua
+++ b/xmake/platforms/macosx/xmake.lua
@@ -50,7 +50,7 @@ platform("macosx")
     end)
 
     -- set toolchains
-    set_toolchains("envs", "xcode", "clang", "gcc", "yasm", "nasm", "cuda", "dlang", "rust", "go")
+    set_toolchains("envs", "xcode", "clang", "gcc", "yasm", "nasm", "cuda", "dlang", "rust", "go", "gfortran")
 
     -- set menu
     set_menu {
diff --git a/xmake/platforms/msys/xmake.lua b/xmake/platforms/msys/xmake.lua
index ec73a87ee..12162d064 100644
--- a/xmake/platforms/msys/xmake.lua
+++ b/xmake/platforms/msys/xmake.lua
@@ -51,5 +51,5 @@ platform("msys")
     end)
 
     -- set toolchains
-    set_toolchains("envs", "cross", "gcc", "clang", "yasm")
+    set_toolchains("envs", "cross", "gcc", "clang", "yasm", "gfortran")
 
diff --git a/xmake/platforms/windows/xmake.lua b/xmake/platforms/windows/xmake.lua
index 9dd8fecbd..c53613d71 100644
--- a/xmake/platforms/windows/xmake.lua
+++ b/xmake/platforms/windows/xmake.lua
@@ -48,7 +48,7 @@ platform("windows")
     end)
 
     -- set toolchains
-    set_toolchains("msvc", "clang", "yasm", "nasm", "cuda", "dlang", "rust", "go")
+    set_toolchains("msvc", "clang", "yasm", "nasm", "cuda", "dlang", "rust", "go", "gfortran")
 
     -- set menu
     set_menu {
diff --git a/xmake/rules/fortran/xmake.lua b/xmake/rules/fortran/xmake.lua
new file mode 100644
index 000000000..1e694cfd8
--- /dev/null
+++ b/xmake/rules/fortran/xmake.lua
@@ -0,0 +1,44 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        xmake.lua
+--
+
+-- define rule: fortran.build
+rule("fortran.build")
+    set_sourcekinds("fc")    
+    on_load(function (target)
+        -- we disable to build across targets in parallel, because the source files may depend on other target modules
+        target:set("policy", "build.across_targets_in_parallel", false)
+    end)
+    on_build_files("private.action.build.object", {batch = true})
+
+-- define rule: fortran
+rule("fortran")
+
+    -- add build rules
+    add_deps("fortran.build")
+
+    -- inherit links and linkdirs of all dependent targets by default
+    add_deps("utils.inherit.links")
+
+    -- support `add_files("src/*.o")` and `add_files("src/*.a")` to merge object and archive files to target
+    add_deps("utils.merge.object", "utils.merge.archive")
+
+    -- we attempt to extract symbols to the independent file and 
+    -- strip self-target binary if `set_symbols("debug")` and `set_strip("all")` are enabled
+    add_deps("utils.symbols.extract")
diff --git a/xmake/templates/fortran/console/project/src/main.f90 b/xmake/templates/fortran/console/project/src/main.f90
new file mode 100644
index 000000000..a332e8401
--- /dev/null
+++ b/xmake/templates/fortran/console/project/src/main.f90
@@ -0,0 +1,3 @@
+program hello
+  print *, "Hello World!"
+end program hello
diff --git a/xmake/templates/fortran/console/project/xmake.lua b/xmake/templates/fortran/console/project/xmake.lua
new file mode 100644
index 000000000..b12d74cce
--- /dev/null
+++ b/xmake/templates/fortran/console/project/xmake.lua
@@ -0,0 +1,6 @@
+add_rules("mode.debug", "mode.release")
+
+target("${TARGETNAME}")
+    set_kind("binary")
+    add_files("src/*.f90")
+
diff --git a/xmake/templates/fortran/console/template.lua b/xmake/templates/fortran/console/template.lua
new file mode 100644
index 000000000..ed2e13b57
--- /dev/null
+++ b/xmake/templates/fortran/console/template.lua
@@ -0,0 +1,2 @@
+template("console")
+    add_configfiles("xmake.lua")
diff --git a/xmake/templates/fortran/shared/project/src/main.f90 b/xmake/templates/fortran/shared/project/src/main.f90
new file mode 100644
index 000000000..9adea3e26
--- /dev/null
+++ b/xmake/templates/fortran/shared/project/src/main.f90
@@ -0,0 +1,5 @@
+program hello
+    use test, only: print_hello
+    implicit none (type, external)
+    call print_hello()
+end program hello
diff --git a/xmake/templates/fortran/shared/project/src/test.f90 b/xmake/templates/fortran/shared/project/src/test.f90
new file mode 100644
index 000000000..b1e97a36c
--- /dev/null
+++ b/xmake/templates/fortran/shared/project/src/test.f90
@@ -0,0 +1,8 @@
+module test
+    implicit none (type, external)
+    
+contains
+    subroutine print_hello()
+        print *, "Hello World!"
+    end subroutine print_hello
+end module test
diff --git a/xmake/templates/fortran/shared/project/xmake.lua b/xmake/templates/fortran/shared/project/xmake.lua
new file mode 100644
index 000000000..04bf17567
--- /dev/null
+++ b/xmake/templates/fortran/shared/project/xmake.lua
@@ -0,0 +1,11 @@
+add_rules("mode.debug", "mode.release")
+
+target("${TARGETNAME}_lib")
+    set_kind("shared")
+    add_files("src/test.f90")
+
+target("${TARGETNAME}")
+    set_kind("binary")
+    add_deps("${TARGETNAME}_lib")
+    add_files("src/main.f90")
+
diff --git a/xmake/templates/fortran/shared/template.lua b/xmake/templates/fortran/shared/template.lua
new file mode 100644
index 000000000..d7ec5bae4
--- /dev/null
+++ b/xmake/templates/fortran/shared/template.lua
@@ -0,0 +1,2 @@
+template("shared")
+    add_configfiles("xmake.lua")
diff --git a/xmake/templates/fortran/static/project/src/main.f90 b/xmake/templates/fortran/static/project/src/main.f90
new file mode 100644
index 000000000..9adea3e26
--- /dev/null
+++ b/xmake/templates/fortran/static/project/src/main.f90
@@ -0,0 +1,5 @@
+program hello
+    use test, only: print_hello
+    implicit none (type, external)
+    call print_hello()
+end program hello
diff --git a/xmake/templates/fortran/static/project/src/test.f90 b/xmake/templates/fortran/static/project/src/test.f90
new file mode 100644
index 000000000..b1e97a36c
--- /dev/null
+++ b/xmake/templates/fortran/static/project/src/test.f90
@@ -0,0 +1,8 @@
+module test
+    implicit none (type, external)
+    
+contains
+    subroutine print_hello()
+        print *, "Hello World!"
+    end subroutine print_hello
+end module test
diff --git a/xmake/templates/fortran/static/project/xmake.lua b/xmake/templates/fortran/static/project/xmake.lua
new file mode 100644
index 000000000..694c1d390
--- /dev/null
+++ b/xmake/templates/fortran/static/project/xmake.lua
@@ -0,0 +1,11 @@
+add_rules("mode.debug", "mode.release")
+
+target("${TARGETNAME}_lib")
+    set_kind("static")
+    add_files("src/test.f90")
+
+target("${TARGETNAME}")
+    set_kind("binary")
+    add_deps("${TARGETNAME}_lib")
+    add_files("src/main.f90")
+
diff --git a/xmake/templates/fortran/static/template.lua b/xmake/templates/fortran/static/template.lua
new file mode 100644
index 000000000..abfe91a4b
--- /dev/null
+++ b/xmake/templates/fortran/static/template.lua
@@ -0,0 +1,2 @@
+template("static")
+    add_configfiles("xmake.lua")
diff --git a/xmake/toolchains/gfortran/xmake.lua b/xmake/toolchains/gfortran/xmake.lua
new file mode 100644
index 000000000..a9528eba5
--- /dev/null
+++ b/xmake/toolchains/gfortran/xmake.lua
@@ -0,0 +1,39 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        xmake.lua
+--
+
+-- define toolchain
+toolchain("gfortran")
+
+    -- set homepage
+    set_homepage("https://fortran.com/")
+    set_description("GNU Fortran Programming Language Compiler")
+        
+    -- set toolset
+    set_toolset("fc",   "$(env FC)", "gfortran")
+    set_toolset("fcld", "$(env FC)", "gfortran")
+    set_toolset("fcsh", "$(env FC)", "gfortran")
+
+    -- on load
+    on_load(function (toolchain)
+        local march = toolchain:is_arch("x86_64", "x64") and "-m64" or "-m32"
+        toolchain:add("fcflags",   march)
+        toolchain:add("fcshflags", march)
+        toolchain:add("fcldflags", march)
+    end)