+env.Append(PROTOCPATH = '#../generator')
+
+# Check the compilation environment, unless we are just cleaning up.
+if not env.GetOption('clean'):
+ def check_ccflags(context, flags, linkflags = ''):
+ '''Check if given CCFLAGS are supported'''
+ context.Message('Checking support for CCFLAGS="%s"... ' % flags)
+ oldflags = context.env['CCFLAGS']
+ oldlinkflags = context.env['CCFLAGS']
+ context.env.Append(CCFLAGS = flags)
+ context.env.Append(LINKFLAGS = linkflags)
+ result = context.TryCompile("int main() {return 0;}", '.c')
+ context.env.Replace(CCFLAGS = oldflags)
+ context.env.Replace(LINKFLAGS = oldlinkflags)
+ context.Result(result)
+ return result
+
+ conf = Configure(env, custom_tests = {'CheckCCFLAGS': check_ccflags})
+
+ # If the platform doesn't support C99, use our own header file instead.
+ stdbool = conf.CheckCHeader('stdbool.h')
+ stdint = conf.CheckCHeader('stdint.h')
+ stddef = conf.CheckCHeader('stddef.h')
+ string = conf.CheckCHeader('string.h')
+ stdlib = conf.CheckCHeader('stdlib.h')
+ if not stdbool or not stdint or not stddef or not string:
+ conf.env.Append(CPPDEFINES = {'PB_SYSTEM_HEADER': '\\"pb_syshdr.h\\"'})
+ conf.env.Append(CPPPATH = "#../extra")
+
+ if stdbool: conf.env.Append(CPPDEFINES = {'HAVE_STDBOOL_H': 1})
+ if stdint: conf.env.Append(CPPDEFINES = {'HAVE_STDINT_H': 1})
+ if stddef: conf.env.Append(CPPDEFINES = {'HAVE_STDDEF_H': 1})
+ if string: conf.env.Append(CPPDEFINES = {'HAVE_STRING_H': 1})
+ if stdlib: conf.env.Append(CPPDEFINES = {'HAVE_STDLIB_H': 1})
+
+ # Check if we can use pkg-config to find protobuf include path
+ status, output = conf.TryAction('pkg-config protobuf --variable=includedir > $TARGET')
+ if status:
+ conf.env.Append(PROTOCPATH = output.strip())
+ else:
+ conf.env.Append(PROTOCPATH = '/usr/include')
+
+ # Check if libmudflap is available (only with GCC)
+ if 'gcc' in env['CC']:
+ if conf.CheckLib('mudflap'):
+ conf.env.Append(CCFLAGS = '-fmudflap')
+ conf.env.Append(LINKFLAGS = '-fmudflap')
+
+ # Check if we can use extra strict warning flags (only with GCC)
+ extra = '-Wcast-qual -Wlogical-op -Wconversion'
+ extra += ' -fstrict-aliasing -Wstrict-aliasing=1'
+ extra += ' -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls'
+ extra += ' -Wstack-protector '
+ if 'gcc' in env['CC']:
+ if conf.CheckCCFLAGS(extra):
+ conf.env.Append(CORECFLAGS = extra)
+
+ # Check if we can use undefined behaviour sanitizer (only with clang)
+ extra = '-fsanitize=undefined '
+ if 'clang' in env['CC']:
+ if conf.CheckCCFLAGS(extra, linkflags = extra):
+ conf.env.Append(CORECFLAGS = extra)
+ conf.env.Append(LINKFLAGS = extra)
+
+ # End the config stuff
+ env = conf.Finish()
+
+# Initialize the CCFLAGS according to the compiler
+if 'gcc' in env['CC']:
+ # GNU Compiler Collection
+
+ # Debug info, warnings as errors
+ env.Append(CFLAGS = '-ansi -pedantic -g -Wall -Werror -fprofile-arcs -ftest-coverage -fstack-protector-all')
+ env.Append(CORECFLAGS = '-Wextra')
+ env.Append(LINKFLAGS = '-g --coverage')
+
+ # We currently need uint64_t anyway, even though ANSI C90 otherwise..
+ env.Append(CFLAGS = '-Wno-long-long')
+elif 'clang' in env['CC']:
+ # CLang
+ env.Append(CFLAGS = '-ansi -g -Wall -Werror')
+ env.Append(CORECFLAGS = ' -Wextra -Wcast-qual -Wconversion')
+elif 'cl' in env['CC']:
+ # Microsoft Visual C++
+
+ # Debug info on, warning level 2 for tests, warnings as errors
+ env.Append(CFLAGS = '/Zi /W2 /WX')
+ env.Append(LINKFLAGS = '/DEBUG')
+
+ # More strict checks on the nanopb core
+ env.Append(CORECFLAGS = '/W4')
+
+ # PB_RETURN_ERROR triggers C4127 because of while(0)
+ env.Append(CFLAGS = '/wd4127')
+elif 'tcc' in env['CC']:
+ # Tiny C Compiler
+ env.Append(CFLAGS = '-Wall -Werror -g')