Toolchain: Remove references to -lm

Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/77f124c87a
Pull-request: https://github.com/SerenityOS/serenity/pull/15149
Reviewed-by: https://github.com/ADKaster ✅

Toolchain/CMake/LLVMRuntimesConfig.cmake

@@ -58,8 +58,5 @@ set(CMAKE_CXX_FLAGS ${compiler_flags} CACHE STRING "")
 set(LIBCXX_USE_COMPILER_RT ON CACHE BOOL "")
 set(LIBCXX_ENABLE_STATIC_ABI_LIBRARY ON CACHE BOOL "")
 set(LIBCXX_INCLUDE_BENCHMARKS OFF CACHE BOOL "")
-if (NOT "${SERENITY_TOOLCHAIN_ARCH}" STREQUAL "aarch64")
-    set(LIBCXX_HAS_M_LIB ON CACHE BOOL "")
-endif()
 set(LIBCXXABI_USE_COMPILER_RT ON CACHE BOOL "")
 set(LIBUNWIND_USE_COMPILER_RT ON CACHE BOOL "")

Toolchain/Patches/gcc/0001-Add-a-gcc-driver-for-SerenityOS.patch

@@ -21,7 +21,7 @@ Co-Authored-By: Shannon Booth <shannon.ml.booth@gmail.com>
 ---
  gcc/config.gcc             | 20 ++++++++++++++++
  gcc/config/i386/serenity.h |  7 ++++++
- gcc/config/serenity.h      | 47 ++++++++++++++++++++++++++++++++++++++
+ gcc/config/serenity.h      | 51 ++++++++++++++++++++++++++++++++++++++
  gcc/config/serenity.opt    | 35 ++++++++++++++++++++++++++++
  4 files changed, 109 insertions(+)
  create mode 100644 gcc/config/i386/serenity.h
@@ -84,7 +84,7 @@ new file mode 100644
 index 000000000..dc2f5361e
 --- /dev/null
 +++ b/gcc/config/serenity.h
-@@ -0,0 +1,47 @@
+@@ -0,0 +1,51 @@
 +/* Useful if you wish to make target-specific GCC changes. */
 +#undef TARGET_SERENITY
 +#define TARGET_SERENITY 1
@@ -122,6 +122,10 @@ index 000000000..dc2f5361e
 +/* Use --as-needed -lgcc_s for eh support. */
 +#define USE_LD_AS_NEEDED 1
 +
++/* We don't have a separate math library, it's included within libc. While we do have compatibility
++   linker scripts in place, just don't add it to the linker invocation to begin with. */
++#define MATH_LIBRARY ""
++
 +/* Additional predefined macros. */
 +#undef TARGET_OS_CPP_BUILTINS
 +#define TARGET_OS_CPP_BUILTINS()      \

Toolchain/Patches/llvm/0003-Driver-Add-support-for-SerenityOS.patch

@@ -144,7 +144,7 @@ new file mode 100644
 index 000000000..6fc664a05
 --- /dev/null
 +++ b/clang/lib/Driver/ToolChains/Serenity.cpp
-@@ -0,0 +1,337 @@
+@@ -0,0 +1,336 @@
 +//===---- Serenity.cpp - SerenityOS ToolChain Implementation ----*- C++ -*-===//
 +//
 +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
@@ -301,7 +301,6 @@ index 000000000..6fc664a05
 +    TC.AddCXXStdlibLibArgs(Args, CmdArgs);
 +    if (OnlyLibstdcxxStatic)
 +      CmdArgs.push_back("-Bdynamic");
-+    CmdArgs.push_back("-lm");
 +    CmdArgs.push_back("--pop-state");
 +  }
 +