Use argv in OSSH_CHECK_CFLAG_COMPILE test.

configure.ac is not detecting -Wextra in compilers that implement the
option. The problem is that -Wextra implies -Wunused-parameter, and the
C excerpt used by aclocal.m4 does not use argv.  Patch from pedro at
ambientworks.net, ok djm@

1 files changed, 3 insertions, 0 deletions

diff --git a/aclocal.m4 b/aclocal.m4
index 0193c3dc..b70856e4 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -15,6 +15,7 @@ AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{
 #include <stdlib.h>
 #include <stdio.h>
 int main(int argc, char **argv) {
+	(void)argv;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
@@ -62,6 +63,7 @@ AC_DEFUN([OSSH_CHECK_CFLAG_LINK], [{
 #include <stdlib.h>
 #include <stdio.h>
 int main(int argc, char **argv) {
+	(void)argv;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;
@@ -100,6 +102,7 @@ AC_DEFUN([OSSH_CHECK_LDFLAG_LINK], [{
 #include <stdlib.h>
 #include <stdio.h>
 int main(int argc, char **argv) {
+	(void)argv;
 	/* Some math to catch -ftrapv problems in the toolchain */
 	int i = 123 * argc, j = 456 + argc, k = 789 - argc;
 	float l = i * 2.1;