File dia-configure-c99.patch of Package dia

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File dia-configure-c99.patch of Package dia

C99 removes support for implicit ints, so declare the return type
of main explicitly.  Future compilers are likely to require explicit
type declarations.

Upstream has switched to Meson, and it does not seem to use this
particular check anymore.

diff --git a/configure b/configure
index 14cdc757c3ee0f15..504ae93d8e3a4f48 100755
--- a/configure
+++ b/configure
@@ -17571,7 +17571,7 @@ $as_echo_n "checking for png_structp in png.h... " >&6; }
                   png_structp pp;
 		  png_infop info;
 		  png_colorp cmap;
-		  main() { void*foo = png_create_read_struct; }
+		  int main(void) { void*foo = png_create_read_struct; }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
   png_ok=yes
diff --git a/configure.in b/configure.in
index c5edeeddf766d5fb..f90ed4ef953af139 100644
--- a/configure.in
+++ b/configure.in
@@ -197,7 +197,7 @@ if test "$png_ok" = yes; then
                   png_structp pp;
 		  png_infop info; 
 		  png_colorp cmap; 
-		  main() { void*foo = png_create_read_struct; }],
+		  int main(void) { void*foo = png_create_read_struct; }],
                  png_ok=yes,
                  png_ok=no)
   LDFLAGS="${old_LDFLAGS}"

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File dia-configure-c99.patch of Package dia

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