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Re: getgroups.c failes to compile

From: Bruno Haible
Subject: Re: getgroups.c failes to compile
Date: Sat, 18 May 2019 02:58:42 +0200
User-agent: KMail/5.1.3 (Linux/4.4.0-145-generic; KDE/5.18.0; x86_64; ; )

Mohammad Akhlaghi wrote:
> To avoid similar situations in the future, it may be good to add a check 
> in the `configure' script so if `getgroups' fails, but the system is a 
> GNU system, the configure script crashes with a warning (after all 
> `make' will crash, but a crash in `configure' is more clear than a crash 
> in `make'). Of course, this test can be done with all components similar 
> to `getgroups' through a single macro/function.

We have such a check already in every configure script. It's the
  checking whether the C compiler works
check, which catches 90% of the wrong combinations of CFLAGS, LDFLAGS,
and such.

In this case, this check succeeded, and it was only later during configuration
that the
  checking for library containing wcspih
check found -lwcs.

It is be possible to search libraries using AC_RUN_IFELSE instead of
AC_LINK_IFELSE, and add -rpath options as needed. The AC_LIB_LINKFLAGS
macro from gnulib does this. It appears that you used the stock Autoconf
macro, which does not do this.


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