cmake: detect realpath

Change the realpath definition to have a CLAR_ prefix - `CLAR_HAS_REALPATH` - and check in the CMake run for it.
clar-test · Jan 23, 2025 · 13931e5 · 13931e5
1 parent fac823c
commit 13931e5
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,9 +1,16 @@
+include(CheckFunctionExists)
+
 cmake_minimum_required(VERSION 3.16..3.29)
 
 project(clar LANGUAGES C)
 
 option(BUILD_EXAMPLE "Build the example." ON)
 
+check_function_exists(realpath CLAR_HAS_REALPATH)
+if(CLAR_HAS_REALPATH)
+	add_compile_definitions(-DCLAR_HAS_REALPATH)
+endif()
+
 add_library(clar INTERFACE)
 target_sources(clar INTERFACE
 	clar.c

diff --git a/clar/sandbox.h b/clar/sandbox.h
@@ -104,7 +104,7 @@ static int canonicalize_tmp_path(char *buffer)
 			*p = '/';
 
 	return 0;
-#elif defined(__APPLE__) || defined(HAS_REALPATH)
+#elif defined(CLAR_HAS_REALPATH)
 	char tmp[CLAR_MAX_PATH];
 
 	if (realpath(buffer, tmp) == NULL)