Cannot make libskia.so work

[宋子明]

Hi, im trying to build libskia.so and use it in my application. I can build the shared object successfully, but when I link my program against it, I got an error saying:

/tmp/ccRxLGCL.o: In function `SkStrFind(char const*, char const*)':

main.cpp:(.text+0x136): undefined reference to `SkToS32(long)'

collect2: error: ld returned 1 exit status

That libskia.so was built in release mode, and I checked src/core/SkDebug.cpp and found that SkToS32 only present in debug mode. I didn't set the SK_DEBUG macro but my program still trying to use that function.

If I build the shared object in debug mode, then I got a compile error when building the library:

GYP_GENERATORS environment variable not set, using default

GYP_GENERATORS is "ninja"

Updating projects from gyp files...

ninja -C out/Debug most

ninja: Entering directory `out/Debug'

[104/1024] LINK skpdiff

FAILED: c++ -m64 -pie -Wl,-rpath=\$ORIGIN/lib/ -Wl,-rpath-link=lib/ -o skpdiff -Wl,--start-group obj/tools/skpdiff/skpdiff.skpdiff_main.o obj/tools/skpdiff/skpdiff.SkDiffContext.o obj/tools/skpdiff/skpdiff.SkImageDiffer.o obj/tools/skpdiff/skpdiff.SkPMetric.o obj/tools/skpdiff/skpdiff.skpdiff_util.o obj/tools/skpdiff/skpdiff.SkDifferentPixelsMetric_cpu.o obj/gyp/libflags.a obj/gyp/libpicture_utils.a -Wl,--end-group lib/libskia.so -lrt -lpng -lz -lgif

/usr/bin/ld: obj/tools/skpdiff/skpdiff.SkDiffContext.o: undefined reference to symbol 'pthread_mutexattr_settype@@GLIBC_2.2.5'

//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line

collect2: error: ld returned 1 exit status

[104/1024] LINK skhello

FAILED: c++ -m64 -pie -Wl,-rpath=\$ORIGIN/lib/ -Wl,-rpath-link=lib/ -o skhello -Wl,--start-group obj/tools/skhello.skhello.o obj/gyp/libflags.a libskia_pdf.a obj/gyp/libskflate.a -Wl,--end-group lib/libskia.so -lpng -lz -lgif

/usr/bin/ld: libskia_pdf.a(pdf.SkPDFStream.o): undefined reference to symbol 'pthread_mutexattr_settype@@GLIBC_2.2.5'

//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line

collect2: error: ld returned 1 exit status

[104/1024] LINK render_pdfs

FAILED: c++ -m64 -pie -Wl,-rpath=\$ORIGIN/lib/ -Wl,-rpath-link=lib/ -o render_pdfs -Wl,--start-group obj/tools/render_pdfs.render_pdfs_main.o obj/gyp/libflags.a libskia_pdf.a obj/gyp/libpicture_utils.a obj/gyp/libproc_stats.a obj/gyp/libskflate.a -Wl,--end-group lib/libskia.so -lpng -lz -lgif

/usr/bin/ld: libskia_pdf.a(pdf.SkPDFStream.o): undefined reference to symbol 'pthread_mutexattr_settype@@GLIBC_2.2.5'

//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line

collect2: error: ld returned 1 exit status

[104/1024] LINK lua_app

ninja: build stopped: subcommand failed.

make: *** [most] Error 1

I wonder if there is any mistake in the way I build the libskia.so, which is:

./gyp_skia

export GYP_DEFINES="skia_shared_lib=1"

make BUILDTYPE=Release -j4

(then copy out/Release/lib/libskia.so to my project source folder along with skia's include directory)

(compile my program using:)

g++ main.cpp -o test -I include/core -I include/config -L. -lskia

Thank in advance

[Menci]

你系统是32还是64?他编译的是64位的Skia
Is your system 32-bits or 64-bits?It was compiling the 64-bits Skia

在 2015年1月25日星期日 UTC+8下午10:13:20，宋子明写道：

[宋子明]

我用的是64位Ubuntnu 14.04.1

Im using ubuntu 14.04.1 64 bit.

[Menci]

我编译静态库成功了,动态库我没试过,你更新下系统试试,我在Fedora21 x86 clang3.5环境下编译静态库成功了
它的命令行里好像没有链接pthread库......你给加上试试

在 2015年3月1日星期日 UTC+8下午2:22:51，宋子明写道：