From 9f72a8aa6b7e1402450d1d5e0745fa05ee3b4746 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9rgio=20M=2E=20Basto?= <sergio@serjux.com>
Date: Tue, 31 Aug 2021 22:08:02 +0100
Subject: [PATCH] Fix for commit 3d7bf376

we need use += and a space CXXFLAGS+=" -O3 -ffast-math" , if not += you override all system settings for CXXFLAGS and none for LDFLAGS, which ends with "/usr/bin/ld: /tmp/ccARck2g.o: relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a PIE object; recompile with -fPIE`"

https://stackoverflow.com/a/38579792/778517
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c15e348..364c1f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,7 @@ AC_LANG(C++)
 
 # Compiler flags. Apply -ffast-math to allow gcc autovectorization
 # generate effective SIMD code.
-CXXFLAGS="-O3 -ffast-math"
+CXXFLAGS+=" -O3 -ffast-math"
 
 # Set AR_FLAGS to avoid build warning "ar: `u' modifier ignored since `D' is the default (see `U')"
 AR_FLAGS='cr'