Re: GNU Make 4.4.0.91 on openSUSE Leap 15.2

[Paul Smith]

On Sun, 2023-02-19 at 22:15 +0100, Bruno Haible wrote:
> gnulib/m4/glob.m4 contains a test for this bug:

Thanks!  I adapted this for GNU make and hopefully it will correctly
detect this issue.


# Check the system to see if it provides GNU glob.  If not, use our
# local version.  Also avoid versions of glibc which have symlink bug
# https://sourceware.org/bugzilla/show_bug.cgi?id=866 (test from gnulib)
AC_CACHE_CHECK([if system libc has working GNU glob], [make_cv_sys_gnu_glob],[
  if ln -s conf-doesntexist conf$$-globtest 2>/dev/null; then
    make_check_symlink=yes
  else
    make_check_symlink=no
  fi
  if test $cross_compiling = yes || test $make_check_symlink = no; then
    # When cross-compiling or without symlink support, check the version
    AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM(
        [[#include <features.h>
          #include <gnu-versions.h>
          #include <glob.h>
          #include <fnmatch.h>
        ]],
        [[
          #if _GNU_GLOB_INTERFACE_VERSION == 0
            GNU glob not available in libc
          #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 27)
            GNU glob in libc has dangling symlink bug
          #endif
        ]])],
      [make_cv_sys_gnu_glob=yes],
      [make_cv_sys_gnu_glob=no])
  else
    # Check for GNU glob, and that it handles dangling symlinks properly
    AC_RUN_IFELSE(
      [AC_LANG_PROGRAM(
        [[#include <features.h>
          #include <gnu-versions.h>
          #include <glob.h>
          #include <fnmatch.h>
        ]],
        [[
          #if _GNU_GLOB_INTERFACE_VERSION == 0
          return 1;
          #else
          glob_t found;
          if (glob ("conf*-globtest", 0, 0, &found) == GLOB_NOMATCH)
            return 1;
          globfree (&found);
          #endif
        ]])],
      [make_cv_sys_gnu_glob=yes],
      [make_cv_sys_gnu_glob=no],
      [dnl We don't get here.
       :
      ])
  fi
  test $make_check_symlink = no || rm -f conf$$-globtest
])