Build: Fix issue with HAVE_MAPFILE test on Solaris
We have to link the test code into a shared library, or else the mapfile
prevents necessary libc symbols from being exposed.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index efeb51a..7af45a4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -470,8 +470,8 @@
# still work.
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/conftest.map
"VERS_1 { global: foo; local: *; }; VERS_2 { global: foo2; } VERS_1;")
- set(CMAKE_REQUIRED_FLAGS "-Wl,-M,${CMAKE_CURRENT_BINARY_DIR}/conftest.map")
- check_c_source_compiles("void foo() {} void foo2() {} int main(void) { return 0; }"
+ set(CMAKE_REQUIRED_FLAGS "-Wl,-M,${CMAKE_CURRENT_BINARY_DIR}/conftest.map -shared")
+ check_c_source_compiles("int foo() { return 0; } int foo2() { return 2; }"
HAVE_MAPFILE)
set(CMAKE_REQUIRED_FLAGS)
file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/conftest.map)
