From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 6 Apr 2023 08:06:30 +0000 (+0200)
Subject: lib/cmake: add HAVE_WRITABLE_ARGV check
X-Git-Tag: curl-8_1_0~209
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4838863d27d2c6e9610a9caec2806292375d1767;p=thirdparty%2Fcurl.git

lib/cmake: add HAVE_WRITABLE_ARGV check

Assisted-by: Jakub Zakrzewski
Closes #10896
---

diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 8f207588dd..51512045d2 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -131,6 +131,17 @@ if(WIN32)
       set_target_properties(${LIB_NAME} PROPERTIES IMPORT_SUFFIX "_imp.lib")
     endif()
   endif()
+else()
+  # on not-Windows, check for writable argv[]
+    include(CheckCSourceRuns)
+    check_c_source_runs("
+int main(int argc, char **argv)
+{
+  (void)argc;
+  argv[0][0] = ' ';
+  return (argv[0][0] == ' ')?0:1;
+}"
+      HAVE_WRITABLE_ARGV)
 endif()
 
 target_include_directories(${LIB_NAME} INTERFACE