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fix error on -Wimplicit-function-declaration in configure & compile
> conftest.c:50:14: error: call to undeclared library function 'exit' with type 'void (int) __attribute__((noreturn))'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> conftest.c:102:2: error: call to undeclared function 'wait'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> string.c:45:9: error: call to undeclared library function 'malloc' with type 'void *(unsigned long)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
diff '--color=auto' -urN a/configure.ac b/configure.ac
--- a/configure.ac 2004-10-18 16:09:36.000000000 -0000
+++ b/configure.ac 2025-02-26 18:23:10.470314477 -0000
@@ -63,6 +63,7 @@
AC_TRY_RUN([
#include <stdio.h>
#include <signal.h>
+#include <stdlib.h>
int main() { exit(SIGRTMIN >= 0 ? 0 : 1); }
], [
AC_MSG_RESULT([yes])
@@ -94,6 +95,8 @@
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
volatile int count = 0;
diff '--color=auto' -urN a/src/string.c b/src/string.c
--- a/src/string.c 2004-10-06 05:13:30.000000000 -0000
+++ b/src/string.c 2025-02-26 18:23:35.692315718 -0000
@@ -22,6 +22,7 @@
#include <stdint.h>
#include <limits.h>
#include <errno.h>
+#include <stdlib.h>
#include "dnotify.h"
#include "gettext.h"
#define _(s) gettext(s)
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