From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Thu, 2 Jul 2020 05:45:21 +0000 (-0700)
Subject: Default to optimization level 2 in cmake for release mode. Can be overwritten by... 
X-Git-Tag: 1.9.9-b1~137
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57b5617f14ce63e70bd8101f2a64d711a74183ae;p=thirdparty%2Fzlib-ng.git

Default to optimization level 2 in cmake for release mode. Can be overwritten by setting the optimization level with CMAKE_C_FLAGS. MSVC does not have optimization level 3.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 777a2c66f..fd5007b1a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -259,6 +259,12 @@ else()
     endif()
 endif()
 
+# Replace optimization level 3 added by default with level 2
+if(NOT MSVC AND NOT CMAKE_C_FLAGS MATCHES "([\\/\\-]O)3")
+    string(REGEX REPLACE "([\\/\\-]O)3" "\\12"
+        CMAKE_C_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE})
+endif()
+
 # Set architecture alignment requirements
 if(BASEARCH_ARM_FOUND OR (BASEARCH_PPC_FOUND AND "${ARCH}" MATCHES "powerpc64le") OR BASEARCH_X86_FOUND)
     if(NOT DEFINED UNALIGNED_OK)