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|
enable_language(CXX)
if(CMAKE_CXX_COMPILE_OPTIONS_USE_PCH)
add_definitions(-DHAVE_PCH_SUPPORT)
endif()
######################################################################
file(WRITE ${CMAKE_BINARY_DIR}/message.cxx [=[
#include "message.hxx"
#ifndef HAVE_PCH_SUPPORT
#include "string.hxx"
#endif
const char* message()
{
static std::string greeting("hi there");
return greeting.c_str();
}
]=])
file(WRITE ${CMAKE_BINARY_DIR}/message.hxx [=[
const char* message();
]=])
add_library(reuse_decl_order ${CMAKE_BINARY_DIR}/message.cxx)
target_precompile_headers(reuse_decl_order REUSE_FROM pch-generator)
target_include_directories(reuse_decl_order PRIVATE ${CMAKE_BINARY_DIR})
######################################################################
file(WRITE ${CMAKE_BINARY_DIR}/pch.cxx [=[
void nothing()
{
}
]=])
file(WRITE ${CMAKE_BINARY_DIR}/string.hxx [=[
#include <string.h>
namespace std {
struct string
{
char storage[20];
string(const char* s) {
strcpy(storage, s);
}
const char* c_str() const {
return storage;
}
};
}
]=])
add_library(pch-generator ${CMAKE_BINARY_DIR}/pch.cxx)
target_precompile_headers(pch-generator PRIVATE ${CMAKE_BINARY_DIR}/string.hxx)
|
