Bug 1336569 Define SYMBOL_UNDERSCORE for ffi in the mingw build r=glandium

MozReview-Commit-ID: 6BiTcohFDPk

--HG--
extra : rebase_source : d783f2950009d07ea45cdcc693771f4141df6ee9

build/moz.configure/toolchain.configure

@@ -763,6 +763,8 @@ def compiler(language, host_or_target, c_compiler=None, other_compiler=None,
     # Set CC_TYPE/CC_VERSION/HOST_CC_TYPE/HOST_CC_VERSION to allow
     # old-configure to do some of its still existing checks.
     if language == 'C':
+        set_config(
+            '%s_TYPE' % var, delayed_getattr(valid_compiler, 'type'))
         add_old_configure_assignment(
             '%s_TYPE' % var, delayed_getattr(valid_compiler, 'type'))
         add_old_configure_assignment(

config/external/ffi/moz.build

@@ -85,6 +85,9 @@ else:
     elif CONFIG['FFI_TARGET'] == 'X86_64':
         ffi_srcs = ('ffi64.c', 'unix64.S', 'ffi.c', 'sysv.S')
     elif CONFIG['FFI_TARGET'] == 'X86_WIN32':
+        # MinGW Build for 32 bit
+        if CONFIG['CC_TYPE'] == 'gcc':
+            DEFINES['SYMBOL_UNDERSCORE'] = True
         ffi_srcs = ('ffi.c', 'win32.S')
     elif CONFIG['FFI_TARGET'] == 'X86_WIN64':
         ffi_srcs = ('ffi.c', 'win64.S')