diff options
| author | Sam James <sam@gentoo.org> | 2022-09-12 17:28:58 +0100 |
|---|---|---|
| committer | Guy Harris <gharris@sonic.net> | 2022-09-19 00:28:58 -0700 |
| commit | 6de7b5fa705106f9299e8892f9c0cb3a1ed2a5dd (patch) | |
| tree | 8e839074e8e2e68b289a008d635c9b40dfcbeeff /configure.ac | |
| parent | 0b6f8abfb698e3c5ccabfe8d30500ea84aecfa5c (diff) | |
| download | tcpdump-6de7b5fa705106f9299e8892f9c0cb3a1ed2a5dd.tar.gz | |
configure.ac: fix configure tests broken with Clang 15 (implicit function declarations)
Clang 15 makes implicit function declarations fatal by default which
leads to some of tcpdump's configure tests silently failing/returning
the wrong result.
This adds the needed #includes to various tests for the functions used,
resolving the following errors:
```
net-analyzer/tcpdump-4.99.1/clang15.log:47:error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
net-analyzer/tcpdump-4.99.1/clang15.log:51:error: call to undeclared library function 'strcmp' with type 'int (const char *, const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
net-analyzer/tcpdump-4.99.1/clang15.log:55:error: call to undeclared library function 'sscanf' with type 'int (const char *restrict, const char *restrict, ...)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
net-analyzer/tcpdump-4.99.1/clang15.log:68:error: call to undeclared library function 'memset' with type 'void *(void *, int, unsigned long)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
net-analyzer/tcpdump-4.99.1/clang15.log:112:error: call to undeclared function 'ether_ntohost'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
net-analyzer/tcpdump-4.99.1/clang15.log:115: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]
```
Signed-off-by: Sam James <sam@gentoo.org>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 0d9782f8..98195d59 100644 --- a/configure.ac +++ b/configure.ac @@ -87,8 +87,11 @@ if test "x$with_smi" != "xno" ; then AC_TRY_RUN( [ /* libsmi available check */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> #include <smi.h> -main() +int main() { int current, revision, age, n; const int required = 2; @@ -264,6 +267,7 @@ AC_COMPILE_IFELSE( [ AC_LANG_SOURCE( [[ +#include <string.h> /* AF_INET6 available check */ #include <sys/types.h> #ifdef _WIN32 @@ -473,6 +477,8 @@ AC_CHECK_FUNCS(ether_ntohost, [ AC_CACHE_CHECK(for buggy ether_ntohost, ac_cv_buggy_ether_ntohost, [ AC_TRY_RUN([ #include <netdb.h> + #include <netinet/ether.h> + #include <stdlib.h> #include <sys/types.h> #include <sys/param.h> #include <sys/socket.h> |