This is only necessary on MSVC 2010/2012 (and possibly on some ICL versions). This both avoids an extra hack on newer MSVC versions, and better documents what the extra compiler option is used for. --- configure | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/configure b/configure index 814dfbd..b67c4b5 100755 --- a/configure +++ b/configure @@ -3062,7 +3062,7 @@ probe_cc(){ _ld_lib='lib%.a' _ld_path='-libpath:' _flags='-nologo' - _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64' + _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -Dstrtoll=_strtoi64' elif $_cc 2>&1 | grep -q Intel; then _type=icl _ident=$($_cc 2>&1 | head -n1) @@ -3085,7 +3085,7 @@ probe_cc(){ _flags='-nologo -Qdiag-error:4044,10157' # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency # with MSVC which enables it by default. - _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS' + _cflags='-D_USE_MATH_DEFINES -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS' elif $_cc --version 2>/dev/null | grep -q ^cparser; then _type=cparser _ident=$($_cc --version | head -n1) @@ -4734,6 +4734,17 @@ elif enabled_any msvc icl; then fi # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2. check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2 + # The CRT headers contain __declspec(restrict) in a few places, but if redefining + # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict) + # (as it ends up if the restrict redefine is done before including stdlib.h), while + # MSVC 2013 and newer can handle it fine. + # If this declspec fails, force including stdlib.h before the restrict redefinition + # happens in config.h. + if [ $_restrict != restrict ]; then + check_cc <<EOF || add_cflags -FIstdlib.h +__declspec($_restrict) void* foo(int); +EOF + fi fi case $as_type in -- 1.8.1.2 _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel