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build: Add reallocarray to missing.h

reallocarray has been added to glibc relatively recently (version 2.26,
from 2017) and apparently not all users run new enough glibc. Moreover,
reallocarray is not available with uclibc-ng. So use realloc if
reallocarray is not available to avoid the following build failure
raised since commit 891b78e9e8:

/home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib/gcc/xtensa-buildroot-linux-uclibc/10.3.0/../../../../xtensa-buildroot-linux-uclibc/bin/ld: src/sae.o: in function `sae_rx_authenticate':
sae.c:(.text+0xd74): undefined reference to `reallocarray'

Fixes:
 - http://autobuild.buildroot.org/results/c6d3f86282c44645b4f1c61882dc63ccfc8eb35a
This commit is contained in:
Fabrice Fontaine 2021-09-19 21:17:44 +02:00 committed by Denis Kenzior
parent f45696485c
commit ec1c348b4f
2 changed files with 8 additions and 0 deletions

View File

@ -129,6 +129,7 @@ AC_DEFINE_UNQUOTED(WIRED_STORAGEDIR, "${wired_storagedir}",
AC_CHECK_FUNCS(explicit_bzero) AC_CHECK_FUNCS(explicit_bzero)
AC_CHECK_FUNCS(rawmemchr) AC_CHECK_FUNCS(rawmemchr)
AC_CHECK_FUNCS(reallocarray)
AC_CHECK_HEADERS(linux/types.h linux/if_alg.h) AC_CHECK_HEADERS(linux/types.h linux/if_alg.h)

View File

@ -37,3 +37,10 @@ _Pragma("GCC diagnostic ignored \"-Wstringop-overflow=\"")
_Pragma("GCC diagnostic pop") _Pragma("GCC diagnostic pop")
} }
#endif #endif
#ifndef HAVE_REALLOCARRAY
static inline void *reallocarray(void *ptr, size_t nmemb, size_t size)
{
return realloc(ptr, nmemb * size);
}
#endif