From f608fa90db6aa15217b86bf87e9d3c9358373195 Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Thu, 9 Jan 2020 09:27:09 +0000
Subject: Put "-ltommath" in $MATH_LIBS in stead of $LIBS, so it won't be used
 by other checks in the configure script. Suggested by Pietro Cerutti.

---
 unix/configure    | 49 ++++++++++++++++---------------------------------
 unix/configure.ac |  5 ++---
 2 files changed, 18 insertions(+), 36 deletions(-)

diff --git a/unix/configure b/unix/configure
index 04f1dbc..1098ba8 100755
--- a/unix/configure
+++ b/unix/configure
@@ -4681,12 +4681,13 @@ fi
 
     if test $libtommath_ok = yes; then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing mp_log_u32" >&5
-$as_echo_n "checking for library containing mp_log_u32... " >&6; }
-if ${ac_cv_search_mp_log_u32+:} false; then :
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for mp_log_u32 in -ltommath" >&5
+$as_echo_n "checking for mp_log_u32 in -ltommath... " >&6; }
+if ${ac_cv_lib_tommath_mp_log_u32+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  ac_func_search_save_LIBS=$LIBS
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ltommath  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -4705,40 +4706,22 @@ return mp_log_u32 ();
   return 0;
 }
 _ACEOF
-for ac_lib in '' tommath; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_mp_log_u32=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if ${ac_cv_search_mp_log_u32+:} false; then :
-  break
-fi
-done
-if ${ac_cv_search_mp_log_u32+:} false; then :
-
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_tommath_mp_log_u32=yes
 else
-  ac_cv_search_mp_log_u32=no
+  ac_cv_lib_tommath_mp_log_u32=no
 fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_mp_log_u32" >&5
-$as_echo "$ac_cv_search_mp_log_u32" >&6; }
-ac_res=$ac_cv_search_mp_log_u32
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_tommath_mp_log_u32" >&5
+$as_echo "$ac_cv_lib_tommath_mp_log_u32" >&6; }
+if test "x$ac_cv_lib_tommath_mp_log_u32" = xyes; then :
+  MATH_LIBS="$MATH_LIBS -ltommath"
 else
 
-	libtommath_ok=no
-
+    libtommath_ok=no
 fi
 
 fi
diff --git a/unix/configure.ac b/unix/configure.ac
index f0ba688..b893d1a 100644
--- a/unix/configure.ac
+++ b/unix/configure.ac
@@ -180,9 +180,8 @@ if test x"${libtommath_ok}" = x -o x"${libtommath_ok}" != xno; then
 	AC_CHECK_TYPE([mp_int],[],[libtommath_ok=no],[#include <tommath.h>])],[
 	libtommath_ok=no])
     AS_IF([test $libtommath_ok = yes], [
-	AC_SEARCH_LIBS([mp_log_u32],[tommath],[],[
-	libtommath_ok=no
-    ])])
+	AC_CHECK_LIB([tommath],[mp_log_u32],[MATH_LIBS="$MATH_LIBS -ltommath"],[
+    libtommath_ok=no])])
 fi
 AS_IF([test $libtommath_ok = yes], [
   AC_DEFINE(TCL_WITH_EXTERNAL_TOMMATH, 1, [Tcl with external libtommath])
-- 
cgit v0.12