package: libpng: don't append prefix to symbol names in the version script file

Even if Blackfin GNU toolchain add prefix '_' to all symbols,
symbol prefix is not accepted in the link flag --version-script.
Don't append prefix in the symbols in the version script file.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/package/libpng/libpng-02-ignore-symbol-prefix.patch b/package/libpng/libpng-02-ignore-symbol-prefix.patch
new file mode 100644 (file)
index 0000000..7f2cfff
--- /dev/null
+++ b/package/libpng/libpng-02-ignore-symbol-prefix.patch
@@ -0,0 +1,26 @@
+Even if Blackfin GNU toolchain add prefix '_' to all symbols,
+symbol prefix is not accepted in the link flag --version-script.
+Don't append prefix in the symbols in the version script file.
+
+--- libpng-1.6.8/Makefile.am   2013-12-30 18:23:08.261797417 +0800
++++ libpng-1.6.8.bak/Makefile.am       2013-12-30 18:22:15.565795726 +0800
+@@ -225,7 +225,7 @@
+ # interfering with the symbol file format.
+ SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0'\
+               -DPNGLIB_VERSION='@PNGLIB_VERSION@'\
+-              -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)'\
++              -DSYMBOL_PREFIX=''\
+               -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE
+ 
+ if DO_PNG_PREFIX
+--- libpng-1.6.8/Makefile.in   2013-12-30 18:23:08.261797417 +0800
++++ libpng-1.6.8.bak/Makefile.in       2013-12-30 18:22:09.853794547 +0800
+@@ -698,7 +698,7 @@
+ # interfering with the symbol file format.
+ SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0' \
+       -DPNGLIB_VERSION='@PNGLIB_VERSION@' \
+-      -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)' -DPNG_NO_USE_READ_MACROS \
++      -DSYMBOL_PREFIX='' -DPNG_NO_USE_READ_MACROS \
+       -DPNG_BUILDING_SYMBOL_TABLE $(am__append_5)
+ all: $(BUILT_SOURCES) config.h
+       $(MAKE) $(AM_MAKEFLAGS) all-am