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configure: Fix failing libpng and zlib detection

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Since Apple clang version 12 implicit function declarations by default
are (rightfully) an error resulting in failure to compile the configure
tests for libpng and zlib, which make implicit use of exit.

Fix by using return statements (another solution is including stdlib.h).
This commit is contained in:
Dimitri Schoolwerth
2020-12-16 23:22:14 +01:00
committed by Dimitri Schoolwerth
parent d2fc88c03d
commit f6a43a6074
2 changed files with 8 additions and 8 deletions
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8
configure.in
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@@ -2451,13 +2451,13 @@ if test "$wxUSE_ZLIB" != "no" ; then
int main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
if (!f) return 1;
fprintf(f, "%s",
ZLIB_VERSION[0] == '1' &&
(ZLIB_VERSION[2] > '1' ||
(ZLIB_VERSION[2] == '1' &&
ZLIB_VERSION[4] >= '4')) ? "yes" : "no");
exit(0);
return 0;
}
],
ac_cv_header_zlib_h=`cat conftestval`,
@@ -2536,10 +2536,10 @@ if test "$wxUSE_LIBPNG" != "no" ; then
int main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
if (!f) return 1;
fprintf(f, "%s",
PNG_LIBPNG_VER > 90 ? "yes" : "no");
exit(0);
return 0;
}
],
ac_cv_header_png_h=`cat conftestval`,