[Buildroot] [PATCH v3 6/7] package/flex: disable reallocarray

From: Yann E. MORIN <yann.morin.1998@free.fr>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH v3 6/7] package/flex: disable reallocarray
Date: Wed, 27 Sep 2017 23:05:45 +0200	[thread overview]
Message-ID: <20170927210545.GG2903@scaer> (raw)
In-Reply-To: <20170923212414.16744-7-romain.naour@gmail.com>

Romain, All,

On 2017-09-23 23:24 +0200, Romain Naour spake thusly:
> This doesn't compile with glibc 2.26 where reallocarray() as been introduced.
> 
> It's a nasty issue, when reallocarray() is available for the target, flex will
> build a small tool called stage1flex for the host (using _FOR_BUILD) but with
> the config.h generated for the target.
> 
> When the host doesn't have a glibc >= 2.26, reallocarray() is never defined
> while building stage1flex:
> 
> misc.c:147:8: warning : implicit declaration of function ? reallocarray ?
> [-Wimplicit-function-declaration]
>   mem = reallocarray(NULL, (size_t) size, element_size);
>         ^~~~~~~~~~~~
> misc.c:147:6: warning : assignment makes pointer from integer without a cast
> [-Wint-conversion]
>   mem = reallocarray(NULL, (size_t) size, element_size);
>       ^
> 
> Disable reallocarray for now, reallocarray() support may be
> enabled in a followup patch.

What about https://patchwork.ozlabs.org/patch/813474/ which just
backports a fix from upstream (or I'm mislead)?

Regards,
Yann E. MORIN.

> Fixes:
> stage1flex-misc.o: In function `allocate_array':
> misc.c:(.text+0x38f): undefined reference to `reallocarray'
> stage1flex-misc.o: In function `reallocate_array':
> misc.c:(.text+0xc8a): undefined reference to `reallocarray'
> collect2: error: ld returned 1 exit status
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  package/flex/flex.mk | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/package/flex/flex.mk b/package/flex/flex.mk
> index b782699..0196624 100644
> --- a/package/flex/flex.mk
> +++ b/package/flex/flex.mk
> @@ -10,7 +10,8 @@ FLEX_INSTALL_STAGING = YES
>  FLEX_LICENSE = FLEX
>  FLEX_LICENSE_FILES = COPYING
>  FLEX_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES) host-m4
> -FLEX_CONF_ENV = ac_cv_path_M4=/usr/bin/m4
> +FLEX_CONF_ENV = ac_cv_path_M4=/usr/bin/m4 \
> +	ac_cv_func_reallocarray=no
>  HOST_FLEX_DEPENDENCIES = host-m4
>  
>  define FLEX_DISABLE_PROGRAM
> -- 
> 2.9.5
> 
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