Add patch to make configure detect glibc again

Run autoreconf again: we have patches to configure,ac

algol68g-configure-glibc.patch

@@ -0,0 +1,11 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -386,7 +386,7 @@
+ #
+ 
+ AC_MSG_CHECKING([GNU C library])
+-AC_RUN_IFELSE([AC_LANG_PROGRAM([], [(void) gnu_get_libc_version();])],
++AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <gnu/libc-version.h>], [(void) gnu_get_libc_version();])],
+   [AC_MSG_RESULT(yes)
+    AC_DEFINE(HAVE_GNU_C_LIB, 1, [Define this if GNU C library is detected.])
+   ],

algol68g.spec

@@ -7,11 +7,15 @@
 Name: algol68g
 Summary: Algol 68 Genie compiler-interpreter
 Version: 3.5.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: GPLv3+
 URL: https://jmvdveer.home.xs4all.nl/en.algol-68-genie.html
 Source: https://jmvdveer.home.xs4all.nl/%{name}-%{version}.tar.gz
+Patch0: algol68g-configure-glibc.patch
 BuildRequires: gcc
+BuildRequires: autoconf
+BuildRequires: automake
+BuildRequires: autoconf-archive
 BuildRequires: pkgconfig(ncurses)
 BuildRequires: pkgconfig(gsl)
 BuildRequires: pkgconfig(readline)
@@ -37,6 +41,7 @@ that has continuing responsibility for Algol 60 and Algol 68.
 %autosetup -p1
 
 %build
+autoreconf
 %configure
 %make_build
 
@@ -55,6 +60,10 @@ that has continuing responsibility for Algol 60 and Algol 68.
 %exclude %{_pkgdocdir}/COPYING
 
 %changelog
+* Wed May 01 2024 Oleg Girko <ol@infoserver.lv> - 3.5.1-2
+- Add patch to make configure detect glibc again
+- Run autoreconf again: we have patches to configure,ac
+
 * Thu Feb 22 2024 Oleg Girko <ol@infoserver.lv> - 3.5.1-1
 - Update to 3.5.1