[libc-commits] [libc] [libc] Fix fixed point detection and add compile option. (PR #81788)

[via libc-commits]

https://github.com/lntue updated https://github.com/llvm/llvm-project/pull/81788

>From 310bb5f5ad07464e167ad779bda3f1db7a8366e0 Mon Sep 17 00:00:00 2001
From: Tue Ly <lntue.h at gmail.com>
Date: Wed, 14 Feb 2024 20:56:29 +0000
Subject: [PATCH 1/2] [libc] Fix fixed point detection and add compile option.

---
 libc/cmake/modules/LLVMLibCObjectRules.cmake               | 4 ++++
 libc/cmake/modules/compiler_features/check_fixed_point.cpp | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/libc/cmake/modules/LLVMLibCObjectRules.cmake b/libc/cmake/modules/LLVMLibCObjectRules.cmake
index ef1f24863f61ab..54c7e1eaed0bfd 100644
--- a/libc/cmake/modules/LLVMLibCObjectRules.cmake
+++ b/libc/cmake/modules/LLVMLibCObjectRules.cmake
@@ -49,6 +49,10 @@ function(_get_common_compile_options output_var flags)
       list(APPEND compile_options "-ffreestanding")
     endif()
 
+    if(LIBC_COMPILER_HAS_FIXED_POINT)
+      list(APPEND compile_options "-ffixed-point")
+    endif()
+
     list(APPEND compile_options "-fno-builtin")
     list(APPEND compile_options "-fno-exceptions")
     list(APPEND compile_options "-fno-lax-vector-conversions")
diff --git a/libc/cmake/modules/compiler_features/check_fixed_point.cpp b/libc/cmake/modules/compiler_features/check_fixed_point.cpp
index 02932dbf4d722d..a5192697d43f77 100644
--- a/libc/cmake/modules/compiler_features/check_fixed_point.cpp
+++ b/libc/cmake/modules/compiler_features/check_fixed_point.cpp
@@ -1,4 +1,4 @@
-#include "include/llvm-libc-macross/stdfix_macros.h"
+#include "include/llvm-libc-macros/stdfix-macros.h"
 
 #ifndef LIBC_COMPILER_HAS_FIXED_POINT
 #error unsupported

>From 9821e3316ae9fcacf0a0c615960f9667220c618b Mon Sep 17 00:00:00 2001
From: Tue Ly <lntue.h at gmail.com>
Date: Wed, 14 Feb 2024 22:07:23 +0000
Subject: [PATCH 2/2] Add the compile flag for tests.

---
 libc/test/UnitTest/CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libc/test/UnitTest/CMakeLists.txt b/libc/test/UnitTest/CMakeLists.txt
index 9baa41874a83db..e3099e45154765 100644
--- a/libc/test/UnitTest/CMakeLists.txt
+++ b/libc/test/UnitTest/CMakeLists.txt
@@ -31,6 +31,9 @@ function(add_unittest_framework_library name)
     if(TARGET libc.src.time.clock)
       target_compile_definitions(${lib} PRIVATE TARGET_SUPPORTS_CLOCK)
     endif()
+    if(LIBC_COMPILER_HAS_FIXED_POINT)
+      target_compile_options(${lib} PUBLIC -ffixed-point)
+    endif()
   endforeach()
   target_include_directories(${name}.hermetic PRIVATE ${LIBC_BUILD_DIR}/include)
   target_compile_options(${name}.hermetic