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List: autoconf
Subject: Re: Will autoconf work with -Werror=implicit-int and -Werror=implicit-function-declaration ?
From: Florian Weimer <fweimer () redhat ! com>
Date: 2023-12-13 14:29:24
Message-ID: 87r0jqnpkr.fsf () oldenburg ! str ! redhat ! com
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* Zack Weinberg:
> Paul Eggert made some changes back in May that attempt to address this:
> commits 028526149ee804617a302ccef22cc6adbda681b0 and
> 33c26d2700f927432c756ccf7a4fc89403d35b95. Do you have a minimized
> test case for the problem (both the original problem and any remaining
> issues you're aware of are useful to me)?
The latest installment of this issue is here:
configure.ac: Define _DEFAULT_SOURCE along with _XOPEN_SOURCE
<https://github.com/samtools/htslib/pull/1711>
I wasn't aware of this change from
33c26d2700f927432c756ccf7a4fc89403d35b95 ("Fix port of AC_FUNC_MMAP"),
or maybe I just forgot about it:
+#ifndef getpagesize
+# ifdef _SC_PAGESIZE
+# define getpagesize() sysconf (_SC_PAGESIZE)
+# elif defined _SC_PAGE_SIZE
+# define getpagesize() sysconf (_SC_PAGE_SIZE)
+# elif HAVE_GETPAGESIZE
+int getpagesize ();
+# else
This should indeed isolate this test from the outcome of the getpagesize
check because it now prefers sysconf.
I can't test this with htslib unfortunately because I'm not able to
build autoconf from sources for some reason.
Thanks,
Florian
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