Mail Archives: cygwin/2009/07/14/12:19:49
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Dave,
I have been having some difficulties building the latest ffmpeg with
gcc-4.3.2-2; the build would complete but the resulting binaries
wouldn't launch due to the dreaded, ever-so-helpful C0000005
initialization error. Building with gcc-3.4 worked just fine, as it has
for some time on 1.5.
So after rebuilding ffmpeg dozens of times (literally) to eliminate
possible causes one-by-one, I finally found that -O2 was the cause.
Odd, since -O2 is generally safe, and ffmpeg even adds -O3 by default.
So I went through all the flags which -O2 turns on, and the winner
(loser?) is -freorder-functions.
Attached is a .cygport and patch which builds ffmpeg with minimal
dependencies (libbz2 and zlib), and adds -fno-reorder-functions to
CFLAGS (my default is "-O2 -march=i686 -pipe"), which produces working
executables. If I remove -fno-reorder-functions, no such luck.
I know it's not exactly a STC, but hopefully I've narrowed this down
enough that you can help me figure this out.
Yaakov
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name="ffmpeg-0.5-1.cygport"
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filename="ffmpeg-0.5-1.cygport"
DESCRIPTION="FFmpeg Audio/video codecs library"
HOMEPAGE="http://ffmpeg.org/"
SRC_URI="http://ffmpeg.org/releases/${P}.tar.bz2"
#SVN_URI="svn://svn.mplayerhq.hu/ffmpeg"
#SVN_REV=${PV}
#inherit svn
PATCH_URI="r17736-cygwin.patch"
# r17736-headers-install.patch
# r17736-vhook-install.patch"
PKG_NAMES="${PN}"
ffmpeg_CONTENTS='--exclude=html usr/bin/*.exe usr/lib/vhook/ usr/share/'
for l in avcodec:52 avdevice:52 avfilter:0 avformat:52 avutil:49 postproc:51 swscale:0
do
n=${l%:*}
v=${l##*:}
PKG_NAMES+=" lib${n}${v} lib${n}-devel"
declare lib${n}${v}_CONTENTS="usr/bin/cyg${n}-${v}.dll"
declare lib${n}_devel_CONTENTS="usr/include/lib${n}/
usr/lib/lib${n}.*
usr/lib/pkgconfig/lib${n}.pc"
done
unset l n v
src_compile() {
cd ${B}
# -freorder-functions (on with -O2) causes C0000005 initialization errors
CFLAGS+=" -fno-reorder-functions -fomit-frame-pointer"
${S}/configure \
--source-path=${S} \
--prefix=/usr --libdir=/usr/lib --shlibdir=/usr/bin \
--incdir=/usr/include --mandir=/usr/share/man \
--enable-static --enable-shared \
--enable-gpl \
--enable-postproc --enable-swscale --enable-avfilter \
--disable-pthreads \
--disable-libdirac \
--disable-libfaac --disable-libfaad \
--disable-libgsm \
--disable-libmp3lame \
--disable-libnut \
--disable-libopenjpeg \
--disable-libschroedinger \
--disable-libspeex \
--disable-libtheora --disable-libvorbis \
--disable-libx264 \
--disable-libxvid \
--disable-libamr-nb \
--disable-libamr-wb \
--disable-libdc1394 \
--disable-x11grab \
--disable-debug \
--disable-optimizations \
--disable-yasm \
--disable-mmx \
--disable-mmx2 \
--disable-ssse3 \
--disable-altivec \
--disable-amd3dnow \
--disable-amd3dnowext \
--disable-armv5te \
--disable-armv6 \
--disable-armv6t2 \
--disable-armvfp \
--disable-iwmmxt \
--disable-mmi \
--disable-stripping \
--disable-vhook \
|| error "configure failed"
# workaround bug in parallel make
cygmake version.h
cygmake CC="${CC}"
}
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filename="r17736-cygwin.patch"
--- origsrc/ffmpeg/configure 2009-03-02 14:05:36.000000000 -0600
+++ src/ffmpeg/configure 2009-03-02 14:14:27.062500000 -0600
@@ -1591,11 +1591,12 @@ case $target_os in
fi
SLIBPREF="cyg"
SLIBSUF=".dll"
- SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
+ SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
- SHFLAGS='-shared -Wl,--enable-auto-image-base'
+ SHFLAGS='-shared -Wl,--enable-auto-image-base -Wl,--out-implib,lib$(NAME)/lib$(NAME).dll.a'
+ SLIB_INSTALL_EXTRA_CMD='mkdir -p "$(LIBDIR)"; install -m 644 lib$(NAME)/lib$(NAME).dll.a $(LIBDIR)/lib$(NAME).dll.a'
+ LDCONFIG=""
objformat="win32"
- enable dos_paths
;;
*-dos|freedos|opendos)
disable ffplay ffserver vhook
@@ -2430,7 +2431,7 @@ get_version LIBAVFILTER libavfilter/avfi
if enabled shared; then
echo "BUILD_SHARED=yes" >> config.mak
- echo "PIC=-fPIC -DPIC" >> config.mak
+ echo "PIC=-DPIC -DDLL_EXPORT" >> config.mak
echo "LIBTARGET=${LIBTARGET}" >> config.mak
echo "SLIBNAME=${SLIBNAME}" >> config.mak
echo "SLIBNAME_WITH_VERSION=${SLIBNAME_WITH_VERSION}" >> config.mak
--- origsrc/ffmpeg/subdir.mak 2009-03-02 14:05:36.000000000 -0600
+++ src/ffmpeg/subdir.mak 2009-03-02 14:14:52.390625000 -0600
@@ -41,10 +41,12 @@ install-lib$(NAME)-shared: $(SUBDIR)$(SL
install -d "$(SHLIBDIR)"
install -m 755 $(SUBDIR)$(SLIBNAME) "$(SHLIBDIR)/$(SLIBNAME_WITH_VERSION)"
$(STRIP) "$(SHLIBDIR)/$(SLIBNAME_WITH_VERSION)"
+ifneq ($(OS), Windows_NT)
cd "$(SHLIBDIR)" && \
$(LN_S) $(SLIBNAME_WITH_VERSION) $(SLIBNAME_WITH_MAJOR)
cd "$(SHLIBDIR)" && \
$(LN_S) $(SLIBNAME_WITH_VERSION) $(SLIBNAME)
+endif
$(SLIB_INSTALL_EXTRA_CMD)
install-lib$(NAME)-static: $(SUBDIR)$(LIBNAME)
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