ref: 0a8f63f1d2a2fda16db83eca37002ce8ed762ba1
parent: 7ed058cb5729e9ef8ed249e0ce233442537be3fc
author: Paul Brossier <piem@piem.org>
date: Tue Nov 20 17:52:24 EST 2018
[py] fix missing pre-processor output on win-amd64
--- a/python/lib/gen_external.py
+++ b/python/lib/gen_external.py
@@ -74,6 +74,18 @@
cpp_cmd = compiler.cc.split()
cpp_cmd += ['-E']
+ # On win-amd64 (py3.x), the default compiler is cross-compiling, from x86
+ # to amd64 with %WIN_SDK_ROOT%\x86_amd64\cl.exe, but using this binary as a
+ # pre-processor generates no output, so we use %WIN_SDK_ROOT%\cl.exe
+ # instead.
+ if len(cpp_cmd) > 1 and 'cl.exe' in cpp_cmd[-2]:
+ plat = os.path.basename(os.path.dirname(cpp_cmd[-2]))
+ if plat == 'x86_amd64':
+ print('workaround on win64 to avoid empty pre-processor output')+ cpp_cmd[-2] = cpp_cmd[-2].replace('x86_amd64', '')+ elif True in ['amd64' in f for f in cpp_cmd]:
+ print('warning: not using workaround for', cpp_cmd[0], plat)+
if not cpp_cmd:
print("Warning: could not guess preprocessor, using env's CC") cpp_cmd = os.environ.get('CC', 'cc').split()