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authorMartin Storsjö <martin@martin.st>2013-11-04 15:46:34 +0200
committerMartin Storsjö <martin@martin.st>2013-11-13 20:55:11 +0200
commit16381923fb7b9087ce559fb1cd3594469ac6788b (patch)
treec315e7800cb12d4ef3d65ef727fdf544cb45aab4
parent45ef963908f5ccc63161d4c3479ba8f2a56a7705 (diff)
downloadffmpeg-16381923fb7b9087ce559fb1cd3594469ac6788b.tar.gz
configure: Check whether MSVC requires using the C89-to-C99 converter
MSVC does support enough of C99 to work without the converter since the 2013 version. Try to detect which version of the compiler in the path needs to run the C99 converter or not. When the converter is omitted, compilation time is reduced quite drastically. Prior to this, users could still use --cc="c99conv -noconv cl" when running MSVC 2013 to achieve the same. This checks the version number instead of doing a normal compile test, since this check needs to be done earlier in configure, before the normal compile test helpers are usable. Signed-off-by: Martin Storsjö <martin@martin.st>
-rwxr-xr-xconfigure15
1 files changed, 14 insertions, 1 deletions
diff --git a/configure b/configure
index 664fe94531..84ee548eba 100755
--- a/configure
+++ b/configure
@@ -2279,7 +2279,20 @@ case "$toolchain" in
target_exec_args="--track-origins=yes --leak-check=full"
;;
msvc)
- cc_default="c99wrap cl"
+ # Check whether the current MSVC version needs the C99 converter.
+ # From MSVC 2013 (compiler major version 18) onwards, it does actually
+ # support enough of C99 to build libav, but we still need to use
+ # c99wrap for passing command line parameters with a space (for
+ # avoiding msys path mangling/conversion issues). Default to the new
+ # behaviour if the regexp was unable to match anything, since this
+ # successfully parses the version number of existing supported
+ # versions that require the converter (MSVC 2010 and 2012).
+ cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
+ if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
+ cc_default="c99wrap -noconv cl"
+ else
+ cc_default="c99wrap cl"
+ fi
ld_default="c99wrap link"
nm_default="dumpbin -symbols"
ar_default="lib"