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[libpng15] Do not depend upon a GCC feature macro being available for use in

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generating the linker mapfile symbol prefix.
This commit is contained in:
Glenn Randers-Pehrson
2012-06-04 03:07:49 -05:00
parent 60370be808
commit fd53b86e90
3 changed files with 10 additions and 6 deletions
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6
configure.ac
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@@ -145,9 +145,9 @@ AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
if test "$have_ld_version_script" = "yes"; then
AC_MSG_CHECKING([for symbol prefix])
SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
| ${CPP-${CC-gcc} -E} - 2>&1 \
| ${EGREP-grep} "^PREFIX=" \
| ${SED-sed} "s:^PREFIX=::"`
| ${CPP-${CC-gcc} -E} - 2>&1 \
| ${EGREP-grep} "^PREFIX=" \
| ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"`
AC_SUBST(SYMBOL_PREFIX)
AC_MSG_RESULT($SYMBOL_PREFIX)
fi