From 609a2289d76fd9a7dddceabc63d1654fe61e0ffb Mon Sep 17 00:00:00 2001 From: David Symonds Date: Wed, 7 Nov 2007 14:24:28 +1100 Subject: Improve accuracy of check for presence of deflateBound. ZLIB_VERNUM isn't defined in some zlib versions, so this patch does a proper linking test in autoconf to see whether deflateBound exists in zlib. Also, setting NO_DEFLATE_BOUND will also work for folk not using autoconf. Signed-off-by: David Symonds Signed-off-by: Junio C Hamano --- configure.ac | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'configure.ac') diff --git a/configure.ac b/configure.ac index ed7cc895d..ab516db37 100644 --- a/configure.ac +++ b/configure.ac @@ -182,6 +182,26 @@ AC_SUBST(NEEDS_LIBICONV) AC_SUBST(NO_ICONV) test -n "$NEEDS_LIBICONV" && LIBS="$LIBS -liconv" # +# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib. +AC_DEFUN([ZLIBTEST_SRC], [ +#include + +int main(void) +{ + deflateBound(0, 0); + return 0; +} +]) +AC_MSG_CHECKING([for deflateBound in -lz]) +old_LIBS="$LIBS" +LIBS="$LIBS -lz" +AC_LINK_IFELSE(ZLIBTEST_SRC, + [AC_MSG_RESULT([yes])], + [AC_MSG_RESULT([no]) + NO_DEFLATE_BOUND=yes]) +LIBS="$old_LIBS" +AC_SUBST(NO_DEFLATE_BOUND) +# # Define NEEDS_SOCKET if linking with libc is not enough (SunOS, # Patrick Mauritz). AC_CHECK_LIB([c], [socket], -- cgit v1.2.1