Bug 1433383 Properly detect -flto flag. r=froydnj

toolkit/library/StaticXULComponentsEnd/moz.build

@@ -7,8 +7,10 @@ SOURCES += [
 ]
 
 # Don't let LTO reorder StaticXULComponentsStart.o.
-if '-flto' in CONFIG['OS_CXXFLAGS']:
+for f in CONFIG['OS_CXXFLAGS']:
+    if f.startswith('-flto'):
         SOURCES['StaticXULComponentsEnd.cpp'].flags += ['-fno-lto']
+        break
 
 Library('StaticXULComponentsEnd')
 

toolkit/library/moz.build

@@ -92,8 +92,10 @@ SOURCES += [
 SOURCES['StaticXULComponentsStart.cpp'].no_pgo = True
 
 # Don't let LTO reorder StaticXULComponentsStart.o.
-if '-flto' in CONFIG['OS_CXXFLAGS']:
+for f in CONFIG['OS_CXXFLAGS']:
+    if f.startswith('-flto'):
         SOURCES['StaticXULComponentsStart.cpp'].flags += ['-fno-lto']
+        break
 
 if CONFIG['OS_ARCH'] == 'WINNT':
     SOURCES += [