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Xcode 12 and -Werror=implicit-function-declaration #203

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Sep 18, 2020
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Xcode 12 and -Werror=implicit-function-declaration #203

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61 changes: 51 additions & 10 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -653,7 +653,9 @@ case "$host" in
*-*-darwin*)
use_pie=auto
AC_MSG_CHECKING([if we have working getaddrinfo])
AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include <mach-o/dyld.h>
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <mach-o/dyld.h>
#include <stdlib.h>
main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
exit(0);
else
Expand Down Expand Up @@ -1241,7 +1243,7 @@ EOD
esac

AC_MSG_CHECKING([compiler and flags for sanity])
AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]], [[ exit(0); ]])],
AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h> ]], [[ exit(0); ]])],
[ AC_MSG_RESULT([yes]) ],
[
AC_MSG_RESULT([no])
Expand All @@ -1265,6 +1267,7 @@ AC_CHECK_FUNCS([dirname], [AC_CHECK_HEADERS([libgen.h])] , [
[AC_LANG_SOURCE([[
#include <libgen.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char **argv) {
char *s, buf[32];
Expand Down Expand Up @@ -1516,7 +1519,9 @@ AC_MSG_CHECKING([whether struct dirent allocates space for d_name])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <dirent.h>]],
#include <dirent.h>
#include <stdlib.h>
]],
[[
struct dirent d;
exit(sizeof(d.d_name)<=sizeof(char));
Expand Down Expand Up @@ -1630,7 +1635,10 @@ AC_ARG_WITH([libedit],
)
AC_MSG_CHECKING([if libedit version is compatible])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[ #include <histedit.h> ]],
[AC_LANG_PROGRAM([[
#include <histedit.h>
#include <stdlib.h>
]],
[[
int i = H_SETSIZE;
el_init("", NULL, NULL, NULL);
Expand Down Expand Up @@ -2120,7 +2128,11 @@ AC_CHECK_FUNCS([setresgid], [

AC_MSG_CHECKING([for working fflush(NULL)])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[#include <stdio.h>]], [[fflush(NULL); exit(0);]])],
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
]],
[[fflush(NULL); exit(0);]])],
AC_MSG_RESULT([yes]),
[AC_MSG_RESULT([no])
AC_DEFINE([FFLUSH_NULL_BUG], [1],
Expand Down Expand Up @@ -2156,7 +2168,10 @@ AC_CHECK_FUNC([getpagesize],
if test "x$ac_cv_func_snprintf" = "xyes" ; then
AC_MSG_CHECKING([whether snprintf correctly terminates long strings])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[ #include <stdio.h> ]],
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
]],
[[
char b[5];
snprintf(b,5,"123456789");
Expand All @@ -2179,6 +2194,8 @@ if test "x$ac_cv_func_snprintf" = "xyes" ; then
[AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
]],
[[
size_t a = 1, b = 2;
Expand Down Expand Up @@ -2271,6 +2288,7 @@ AC_MSG_CHECKING([for (overly) strict mkstemp])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <unistd.h>
]], [[
char template[]="conftest.mkstemp-test";
if (mkstemp(template) == -1)
Expand Down Expand Up @@ -2298,6 +2316,8 @@ if test ! -z "$check_for_openpty_ctty_bug"; then
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
Expand Down Expand Up @@ -2344,6 +2364,7 @@ if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
Expand Down Expand Up @@ -2412,6 +2433,7 @@ if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
Expand Down Expand Up @@ -2474,7 +2496,10 @@ fi

if test "x$check_for_conflicting_getspnam" = "x1"; then
AC_MSG_CHECKING([for conflicting getspnam in shadow.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <shadow.h> ]],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <shadow.h>
#include <stdlib.h>
]],
[[ exit(0); ]])],
[
AC_MSG_RESULT([no])
Expand Down Expand Up @@ -2504,6 +2529,7 @@ if test "x$ac_cv_func_strnvis" = "xyes"; then
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
static void sighandler(int sig) { _exit(1); }
]], [[
Expand Down Expand Up @@ -2532,6 +2558,7 @@ AC_RUN_IFELSE(
#include <sys/time.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
static void sighandler(int sig) { }
]], [[
int r;
Expand Down Expand Up @@ -2688,6 +2715,7 @@ if test "x$openssl" = "xyes" ; then
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/opensslv.h>
#include <openssl/crypto.h>
Expand Down Expand Up @@ -2749,6 +2777,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([whether OpenSSL's headers match the library])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/opensslv.h>
#include <openssl/crypto.h>
Expand Down Expand Up @@ -2888,6 +2917,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([whether OpenSSL has crippled AES support])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/evp.h>
]], [[
Expand All @@ -2907,6 +2937,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([whether OpenSSL has AES CTR via EVP])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/evp.h>
]], [[
Expand All @@ -2928,6 +2959,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([whether OpenSSL has AES GCM via EVP])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/evp.h>
]], [[
Expand Down Expand Up @@ -2955,6 +2987,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([if EVP_DigestUpdate returns an int])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/evp.h>
]], [[
Expand Down Expand Up @@ -3041,6 +3074,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([if OpenSSL's NID_secp521r1 is functional])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <openssl/ec.h>
#include <openssl/ecdh.h>
#include <openssl/ecdsa.h>
Expand Down Expand Up @@ -3223,6 +3257,7 @@ if test "x$openssl" = "xyes" ; then
AC_MSG_CHECKING([whether OpenSSL's PRNG is internally seeded])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <string.h>
#include <openssl/rand.h>
]], [[
Expand Down Expand Up @@ -3654,6 +3689,7 @@ if test -z "$have_llong_max" && test -z "$have_long_long_max"; then
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
/* Why is this so damn hard? */
#ifdef __GNUC__
# undef __GNUC__
Expand Down Expand Up @@ -4169,6 +4205,7 @@ dnl test snprintf (broken on SCO w/gcc)
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_SNPRINTF
main()
Expand Down Expand Up @@ -4272,6 +4309,7 @@ AC_CACHE_CHECK([for msg_accrights field in struct msghdr],
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <stdlib.h>
]], [[
#ifdef msg_accrights
#error "msg_accrights is a macro"
Expand Down Expand Up @@ -4333,6 +4371,7 @@ AC_CACHE_CHECK([for msg_control field in struct msghdr],
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <stdlib.h>
]], [[
#ifdef msg_control
#error "msg_control is a macro"
Expand All @@ -4353,7 +4392,7 @@ if test "x$ac_cv_have_control_in_msghdr" = "xyes" ; then
fi

AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
[[ extern char *__progname; printf("%s", __progname); ]])],
[ ac_cv_libc_defines___progname="yes" ],
[ ac_cv_libc_defines___progname="no"
Expand Down Expand Up @@ -4425,7 +4464,7 @@ if test "x$ac_cv_have_getopt_optreset" = "xyes" ; then
fi

AC_CACHE_CHECK([if libc defines sys_errlist], ac_cv_libc_defines_sys_errlist, [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
[[ extern const char *const sys_errlist[]; printf("%s", sys_errlist[0]);]])],
[ ac_cv_libc_defines_sys_errlist="yes" ],
[ ac_cv_libc_defines_sys_errlist="no"
Expand All @@ -4438,7 +4477,7 @@ fi


AC_CACHE_CHECK([if libc defines sys_nerr], ac_cv_libc_defines_sys_nerr, [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
[[ extern int sys_nerr; printf("%i", sys_nerr);]])],
[ ac_cv_libc_defines_sys_nerr="yes" ],
[ ac_cv_libc_defines_sys_nerr="no"
Expand Down Expand Up @@ -4747,6 +4786,7 @@ AC_ARG_WITH([maildir],
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
Expand Down Expand Up @@ -4991,6 +5031,7 @@ otherwise scp will not work.])
[AC_LANG_PROGRAM([[
/* find out what STDPATH is */
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_PATHS_H
# include <paths.h>
#endif
Expand Down