generate mingw build files if requested

Set NINJA_PLATFORM=mingw to get them.

diff --git a/gen-build-file.py b/gen-build-file.py
index fb83b20..c0f58c7 100755 (executable)
--- a/gen-build-file.py
+++ b/gen-build-file.py
@@ -25,6 +25,16 @@ sys.path.insert(0, 'misc')
 
 import ninja
 
+platform = os.environ.get('NINJA_PLATFORM', sys.platform)
+if platform.startswith('linux'):
+    platform = 'linux'
+elif platform.startswith('freebsd'):
+    platform = 'freebsd'
+elif platform.startswith('mingw'):
+    platform = 'mingw'
+elif platform.startswith('win'):
+    platform = 'windows'
+
 n = ninja.Writer(sys.stdout)
 n.comment('This file is used to build ninja itself.')
 n.comment('It is generated by ' + os.path.basename(__file__) + '.')
@@ -38,12 +48,20 @@ def cxx(name, **kwargs):
     return n.build(built(name + '.o'), 'cxx', src(name + '.cc'), **kwargs)
 
 n.variable('builddir', 'build')
-n.variable('cxx', os.environ.get('CC', 'g++'))
-cflags = ('-O2 -g -Wall -Wno-deprecated -fno-exceptions -fvisibility=hidden '
-          '-pipe')
+
+cflags = ['-O2', '-g', '-Wall', '-Wno-deprecated', '-fno-exceptions',
+          '-fvisibility=hidden', '-pipe']
+if platform == 'mingw':
+    n.variable('cxx', 'i586-mingw32msvc-c++')
+    # "warning: visibility attribute not supported in this
+    # configuration; ignored"
+    cflags.remove('-fvisibility=hidden')
+else:
+    n.variable('cxx', os.environ.get('CC', 'g++'))
 if 'CFLAGS' in os.environ:
-    cflags += ' ' + os.environ['CFLAGS']
-n.variable('cflags', cflags)
+    cflags.append(os.environ['CFLAGS'])
+n.variable('cflags', ' '.join(cflags))
+
 n.variable('ldflags', os.environ.get('LDFLAGS', ''))
 n.newline()
 
@@ -53,43 +71,51 @@ n.rule('cxx',
        description='CC $out')
 n.newline()
 
+ar = 'ar'
+if platform == 'mingw':
+    ar = 'i586-mingw32msvc-ar'
 n.rule('ar',
-       command='ar crs $out $in',
+       command=ar + ' crs $out $in',
        description='AR $out')
 n.newline()
 
 n.rule('link',
-       command='$cxx $ldflags -o $out $in',
+       command='$cxx $ldflags -o $out $in $libs',
        description='LINK $out')
 n.newline()
 
-n.comment('browse_py.h is used to inline browse.py.')
-n.rule('inline',
-       command='src/inline.sh $varname < $in > $out',
-       description='INLINE $out')
-n.build(built('browse_py.h'), 'inline', src('browse.py'),
-        variables=[('varname', 'kBrowsePy')])
-n.newline()
-
 objs = []
 
-n.comment("TODO: this shouldn't need to depend on inline.sh.")
-objs += cxx('browse',
-            implicit='src/inline.sh',
-            order_only=built('browse_py.h'))
-n.newline()
+if platform not in ('mingw'):
+    n.comment('browse_py.h is used to inline browse.py.')
+    n.rule('inline',
+           command='src/inline.sh $varname < $in > $out',
+           description='INLINE $out')
+    n.build(built('browse_py.h'), 'inline', src('browse.py'),
+            variables=[('varname', 'kBrowsePy')])
+    n.newline()
+
+    n.comment("TODO: this shouldn't need to depend on inline.sh.")
+    objs += cxx('browse',
+                implicit='src/inline.sh',
+                order_only=built('browse_py.h'))
+    n.newline()
 
 n.comment('Core source files all build into ninja library.')
 for name in ['build', 'build_log', 'clean', 'eval_env', 'graph', 'graphviz',
-             'parsers', 'subprocess', 'util',
+             'parsers', 'util', 'subprocess',
              'ninja_jumble']:
+    if platform == 'mingw' and name == 'subprocess':
+        # TODO: merge subprocess port
+        continue
     objs += cxx(name)
-ninja_lib = n.build(built('ninja.a'), 'ar', objs)
+ninja_lib = n.build(built('libninja.a'), 'ar', objs)
 n.newline()
 
 n.comment('Main executable is library plus main() function.')
 objs = cxx('ninja')
-n.build('ninja', 'link', objs + ninja_lib)
+n.build('ninja', 'link', objs, implicit=ninja_lib, order_only=ninja_lib,
+        variables=[('libs', '-L$builddir -lninja')])
 
 n.comment('Tests all build into ninja_test executable.')
 objs = []
@@ -100,9 +126,9 @@ for name in ['build_test', 'build_log_test', 'graph_test', 'ninja_test',
 ldflags = '-lgtest -lgtest_main -lpthread'
 if 'LDFLAGS' in os.environ:
     ldflags += ' ' + os.environ.get('LDFLAGS')
-n.build('ninja_test', 'link',
-        objs + ninja_lib,
-        variables=[('ldflags', ldflags)])
+n.build('ninja_test', 'link', objs, implicit=ninja_lib, order_only=ninja_lib,
+        variables=[('libs', '-L$builddir -lninja'),
+                   ('ldflags', ldflags)])
 n.newline()
 
 n.comment('Generate a graph using the "graph" tool.')