From 0462d760af09de22374df19cc031520acf67348b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dag-Erling=20Sm=C3=B8rgrav?= <des@des.no>
Date: Mon, 9 Sep 2024 12:34:33 +0200
Subject: [PATCH] Further modernize configure.ac.

* Remove `AM_PROG_CC_C_O`, it is implied my `AC_PROG_CC`.
* Move `AC_USE_SYSTEM_EXTENSIONS` up as it need to precede any check
  that uses the compiler.
---
 configure.ac | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 256a180..375e2e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,11 @@ dnl Checks for programs.
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL
-AM_PROG_CC_C_O
+
+dnl Checks for compiler characteristics.
+AC_USE_SYSTEM_EXTENSIONS
+AC_C_CONST
+AC_C_INLINE
 
 tre_version_1=`echo $PACKAGE_VERSION | cut -d . -f 1`
 tre_version_2=`echo $PACKAGE_VERSION | cut -d . -f 2`
@@ -96,11 +100,6 @@ else
 fi
 
 
-dnl Checks for compiler characteristics.
-AC_C_CONST
-AC_C_INLINE
-AC_USE_SYSTEM_EXTENSIONS
-
 dnl Make sure locally configured headers are used (this adds the #define to config.h).
 AC_DEFINE(USE_LOCAL_TRE_H, 1, [ Define to ensure locally configured headers are used ])