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build: Add reallocarray to missing.h

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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 891b78e9e892a3bcd800eb3a298e6380e9a15dd1:

/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
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1
configure.ac
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@ -129,6 +129,7 @@ AC_DEFINE_UNQUOTED(WIRED_STORAGEDIR, "${wired_storagedir}",
AC_CHECK_FUNCS(explicit_bzero)
AC_CHECK_FUNCS(rawmemchr)
AC_CHECK_FUNCS(reallocarray)
AC_CHECK_HEADERS(linux/types.h linux/if_alg.h)

7
src/missing.h
View File

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