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author | Jim Huang <jserv@0xlab.org> | 2010-08-08 15:11:37 +0800 |
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committer | Jim Huang <jserv@0xlab.org> | 2010-08-08 15:11:37 +0800 |
commit | 1cb15eb3049b918c8c1363e874f2efb491cbb534 (patch) | |
tree | 27bae8d6e6f777b68b407e21379adbb077a10d84 /pngconf.h | |
parent | 5f6bd84e375226bf228fc8ac90318957ec9e1e7f (diff) | |
download | external_libpng-1cb15eb3049b918c8c1363e874f2efb491cbb534.zip external_libpng-1cb15eb3049b918c8c1363e874f2efb491cbb534.tar.gz external_libpng-1cb15eb3049b918c8c1363e874f2efb491cbb534.tar.bz2 |
libpng: use GCC visibility to reduce shared library size
The change introduced the implementation for macro PNG_IMPEXP by using
GCC visibility in defaulting of "hidden" attribute.
Experiment on HTC Passion:
target file; out/target/product/passion/system/lib/libskia.so
(libpng was statically linked to libskia.so)
before: 1117888 bytes
after: 1113780 bytes
Code size reduction = 4108 bytes
Change-Id: I9b718a6a5710268dbb945feea3b64ca3fa393b94
Diffstat (limited to 'pngconf.h')
-rw-r--r-- | pngconf.h | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -1505,7 +1505,11 @@ typedef z_stream FAR * png_zstreamp; # define PNGAPI #endif #ifndef PNG_IMPEXP -# define PNG_IMPEXP +# if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) +# define PNG_IMPEXP __attribute__((visibility ("default"))) +# else +# define PNG_IMPEXP +# endif #endif #ifdef PNG_BUILDSYMS |