Re: [Buildroot] [PATCH] package/enscript: fix build issue with musl and gcc >= 15

On 22/08/2026 23:13, Thomas Petazzoni via buildroot wrote:
> enscript currently fails to build with musl with gcc >= 15. In order
> to fix this, we need to bring a number of patches from upstream, and
> add 2 others that were submitted upstream.
> 
> From upstream, we bring
> 0002-Add-CFLAG-std-c89-so-it-compiles-with-the-old-standa.patch, which
> switches to -std=c89 to get the compiler back to "old" behavior.
> 
> However, as this commit patches configure.ac, we need to autoreconf,
> but autoreconf is broken, so we also take
> 0003-Automake-1.12-and-up-no-longer-supports-pre-ANSI.patch from
> upstream, which drops a problematic autoconf macro.
> 
> However, once you drop this problematic autoconf macro, the PROTOTYPES
> define is never set by anything, causing the __P macro to no longer be
> defined properly. This is fixed by
> 0004-Fix-prototype-detection-when-__STDC__-is-defined-but.patch that
> we have submitted upstream.
> 
> Once you're there, you realize that switching to -std=c89 has the side
> effect that musl's <limits.h> no longer defines PATH_MAX, because it
> needs one of:
> 
>   #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
>    || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || 
> defined(_BSD_SOURCE)
> 
> and a side effect of -std=c89 is that none of these is defined
> anymore. So we introduce 0005-Use-std-gnu89-instead-of-std-c89.patch,
> which switches to -std=gnu89. This patch has also been submitted
> upstream.
> 
> With all of these efforts, we get a successful build on musl with gcc
>> = 15.
> 
> This commit needs to be backported to Buildroot versions that support
> gcc 15.x, so that means the currently maintained 2026.x branches, but
> not 2025.02 as only up to gcc 14.x was supported then.
> 
> Fixes:
> 
>   
> https://autobuild.buildroot.org/results/d39d14bbbb3a51d67fe962b877c7f66ff1204ecf/
> 
> Signed-off-by: Thomas Petazzoni <[email protected]>

Applied to master, thanks.
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