From f6f765b3c022cbf01c86dac7f9875cf18e9f9980 Mon Sep 17 00:00:00 2001
From: sdlzx <hdu_sdlzx@163.com>
Date: Wed, 6 Oct 2021 10:25:36 +0800
Subject: [PATCH] Fix hyperscan build error

The command "gcc -Q --help=target" outputs nothing during obs build,
so we manually set "GNUCC_ARCH" to "native" to avoid string manipulation errors.

Signed-off-by: sdlzx <hdu_sdlzx@163.com>
---
 CMakeLists.txt | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b5f8fb4..5cf41ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -197,9 +197,13 @@ else()
             execute_process(COMMAND ${CMAKE_C_COMPILER} ${EXEC_ARGS}
                 OUTPUT_VARIABLE _GCC_OUTPUT)
             string(FIND "${_GCC_OUTPUT}" "march" POS)
-            string(SUBSTRING "${_GCC_OUTPUT}" ${POS} -1 _GCC_OUTPUT)
-            string(REGEX REPLACE "march=[ \t]*([^ \n]*)[ \n].*" "\\1"
-                GNUCC_ARCH "${_GCC_OUTPUT}")
+            if (POS EQUAL -1)
+                set (GNUCC_ARCH "native")
+            else()
+                string(SUBSTRING "${_GCC_OUTPUT}" ${POS} -1 _GCC_OUTPUT)
+                string(REGEX REPLACE "march=[ \t]*([^ \n]*)[ \n].*" "\\1"
+                    GNUCC_ARCH "${_GCC_OUTPUT}")
+            endif()
 
             # test the parsed flag
             set (EXEC_ARGS ${CC_ARG1} -E - -mtune=${GNUCC_ARCH})
-- 
2.31.1