>From 4abb5e1a593b3435ab08cd75c3639ca48ecc4be1 Mon Sep 17 00:00:00 2001 From: Shiyou Yin Date: Fri, 24 Aug 2018 17:22:12 +0800 Subject: [PATCH] configure: [loongson] revert no-expensive-optimizations Add gcc version check before add -fno-expensive-optimizations flag. Only when gcc version is lower than 5.3.0, this flag is needed. More bug info see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67736 https://gcc.gnu.org/ml/gcc-patches/2012-05/msg00401.html Signed-off-by: Shiyou Yin --- configure | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/configure b/configure index b9c9d0b..08cf48e 100755 --- a/configure +++ b/configure @@ -4796,15 +4796,24 @@ elif enabled mips; then disable mipsfpu disable mipsdsp disable mipsdspr2 + # When gcc version less than 5.3.0, add -fno-expensive-optimizations flag. + if [ $cc == gcc ]; then + gcc_version=$(gcc -dumpversion) + if [ "$(echo "$gcc_version 5.3.0" | tr " " "\n" | sort -rV | head -n 1)" == "$gcc_version" ]; then + expensive_optimization_flag="" + else + expensive_optimization_flag="-fno-expensive-optimizations" + fi + fi case $cpu in loongson3*) - cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations" + cpuflags="-march=loongson3a -mhard-float $expensive_optimization_flag" ;; loongson2e) - cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations" + cpuflags="-march=loongson2e -mhard-float $expensive_optimization_flag" ;; loongson2f) - cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations" + cpuflags="-march=loongson2f -mhard-float $expensive_optimization_flag" ;; esac ;; -- 2.1.0