build: tests: support cmake < 3.25

3 files changed, 32 insertions, 8 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7498ad5..5699552 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: 2024 Rafael G. Martins <rafael@rafaelmartins.eng.br>
 # SPDX-License-Identifier: BSD-3-Clause
 
-cmake_minimum_required(VERSION 3.19)
+cmake_minimum_required(VERSION 3.22)
 
 find_package(Git)
 
diff --git a/cmake/try_compile/ldwrap.c b/cmake/try_compile/ldwrap.c
new file mode 100644
index 0000000..cc200e8
--- /dev/null
+++ b/cmake/try_compile/ldwrap.c
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+
+void __real_exit(int status);
+
+void
+__wrap_exit(int s)
+{
+    __real_exit(0);
+}
+
+int
+main()
+{
+    exit(1);
+    return 0;
+}
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e1ca881..8a1d7b0 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -8,13 +8,21 @@ find_program(BASH bash HINTS /bin /usr/bin REQUIRED)
 find_program(DIFF diff REQUIRED)
 find_program(TEE tee REQUIRED)
 
-try_compile(HAVE_LD_WRAP
-    SOURCE_FROM_CONTENT
-        main.c
-        "#include <stdlib.h>\nvoid __real_exit(int status);\nvoid __wrap_exit(int s){__real_exit(0);}\nint main(){exit(1);}"
-    LINK_OPTIONS
-        "-Wl,--wrap=exit"
-)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.25")
+    try_compile(HAVE_LD_WRAP
+        SOURCES
+            "${CMAKE_SOURCE_DIR}/cmake/try_compile/ldwrap.c"
+        LINK_OPTIONS
+            "-Wl,--wrap=exit"
+    )
+else()
+    try_compile(HAVE_LD_WRAP "${CMAKE_BINARY_DIR}/ldwrap"
+        SOURCES
+            "${CMAKE_SOURCE_DIR}/cmake/try_compile/ldwrap.c"
+        LINK_OPTIONS
+            "-Wl,--wrap=exit"
+    )
+endif()
 
 function(blogc_executable_test _libname _src)
     if (NOT CMOCKA_FOUND)