X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/87278972ae64ef4c5eff110af1565b1988160fb4..b8b1c8789189cf94ec1e1a15623531ebecc3eb85:/configure.ac

diff --git a/configure.ac b/configure.ac
index dcb5504..f766023 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,7 @@ AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
 AM_SILENT_RULES([yes])
 
 AC_PROG_CC_C99
+AM_PROG_CC_C_O
 gl_EARLY
 
 LT_INIT
@@ -39,7 +40,19 @@ BISON_I18N
 GLOBAL_SYMBOL_PIPE=$lt_cv_sys_global_symbol_pipe
 AC_SUBST([GLOBAL_SYMBOL_PIPE])
 
-AH_BOTTOM([#include <cfgtail.h>])
+AH_TOP([#include <conf_pre.h>])
+AH_BOTTOM([#include <conf_post.h>])
+
+AC_ARG_WITH([gsl],
+	[AS_HELP_STRING([--with-gsl],
+		[specify whether to build test programs requiring the GNU Scientific Library. [default=auto]]
+	)], [with_gsl=$withval], [with_gsl=auto])
+
+AS_CASE([$with_gsl],
+	[no], [have_gsl=no],
+	[yes], [DX_CHECK_GSL([1.0], [have_gsl=yes])],
+	[DX_CHECK_GSL([1.0], [have_gsl=yes], [have_gsl=no])])
+AM_CONDITIONAL([HAVE_GSL], [test x"$have_gsl" = x"yes"])
 
 AC_CONFIG_FILES([
 	exported.sh