[reactos] 08/12: [CMAKE] Use -ffile-prefix-map for GCC builds

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=683489ccf16759c3aac6a…

commit 683489ccf16759c3aac6a70ed664b2998f7c04d1
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Fri Sep 18 16:19:46 2020 +0200
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Tue Oct 20 21:44:54 2020 +0200

    [CMAKE] Use -ffile-prefix-map for GCC builds
    
    And also simplify the __RELFILE__ macro definition for the other cases
---
 CMakeLists.txt      | 15 ++++++++++-----
 sdk/cmake/gcc.cmake | 12 ------------
 2 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cefcc5f93ae..3de95fe75c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,13 +44,18 @@ include(sdk/cmake/compilerflags.cmake)
 
 add_definitions(-D__REACTOS__)
 
-# Double escape, since CMake unescapes before putting it on the command-line, where
it's unescaped again by GCC/CL.
-add_definitions(-DREACTOS_SOURCE_DIR="${REACTOS_SOURCE_DIR}")
-add_definitions(-DREACTOS_BINARY_DIR="${REACTOS_BINARY_DIR}")
-
 # There doesn't seem to be a standard for __FILE__ being relative or absolute, so
detect it at runtime.
 file(RELATIVE_PATH _PATH_PREFIX ${REACTOS_BINARY_DIR} ${REACTOS_SOURCE_DIR})
-add_compile_flags(-D__RELFILE__="&__FILE__[__FILE__[0] == '.' ? sizeof
\\\"${_PATH_PREFIX}\\\" - 1 : sizeof REACTOS_SOURCE_DIR]")
+if (GCC AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "8.0.0"))
+    # Thankfully, GCC has this
+    add_compile_options(-ffile-prefix-map=${REACTOS_SOURCE_DIR}=)
+    add_compile_options(-ffile-prefix-map=${_PATH_PREFIX}=)
+else()
+    string(LENGTH ${_PATH_PREFIX} _PATH_PREFIX_LENGTH)
+    string(LENGTH ${REACTOS_SOURCE_DIR} REACTOS_SOURCE_DIR_LENGTH)
+    math(EXPR REACTOS_SOURCE_DIR_LENGTH "${REACTOS_SOURCE_DIR_LENGTH} + 1")
+    add_compile_definitions("__RELFILE__=&__FILE__[__FILE__[0] == '.' ?
${_PATH_PREFIX_LENGTH} : ${REACTOS_SOURCE_DIR_LENGTH}]")
+endif()
 
 if(MSVC_IDE)
     add_compile_flags("/MP")
diff --git a/sdk/cmake/gcc.cmake b/sdk/cmake/gcc.cmake
index 3ef5f58598a..d5a20cba42e 100644
--- a/sdk/cmake/gcc.cmake
+++ b/sdk/cmake/gcc.cmake
@@ -69,18 +69,6 @@ if(DBG)
     endif()
 endif()
 
-#bug
-#file(TO_NATIVE_PATH ${REACTOS_SOURCE_DIR} REACTOS_SOURCE_DIR_NATIVE)
-#workaround
-set(REACTOS_SOURCE_DIR_NATIVE ${REACTOS_SOURCE_DIR})
- if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
-string(REPLACE "/" "\\" REACTOS_SOURCE_DIR_NATIVE
${REACTOS_SOURCE_DIR})
-endif()
-
-if((NOT CMAKE_C_COMPILER_ID STREQUAL "Clang") AND (NOT SEPARATE_DBG))
-   
add_compile_flags("-fdebug-prefix-map=\"${REACTOS_SOURCE_DIR_NATIVE}\"=ReactOS")
-endif()
-
 # Debugging
 if(NOT CMAKE_BUILD_TYPE STREQUAL "Release")
     if(SEPARATE_DBG)