Fix Debug Build Using GCC 15 (#152223)

Flang currently doesn't build in debug mode on GCC 15 due to missing
dynamic libraries in some CMakeLists.txt files, and OpenMP doesn't link
in debug mode due to the atomic library pulling in libstdc++ despite an
incomplete attempt in the CMakeLists.txt to disable glibcxx assertions.
This PR fixes these issues and allows Flang and the OpenMP runtime to
build and link on GCC 15 in debug mode.

---------

Co-authored-by: ronlieb <[email protected]>

Author: linuxrocks123

flang-rt/lib/runtime/CMakeLists.txt

@@ -183,6 +183,10 @@ endif ()
 
 
 if (NOT WIN32)
+  add_definitions(-U_GLIBCXX_ASSERTIONS -D_GLIBCXX_NO_ASSERTIONS)
+  add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>)
+  add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-O2>)
+
   add_flangrt_library(flang_rt.runtime STATIC SHARED
     ${sources}
     LINK_LIBRARIES ${Backtrace_LIBRARY}

flang/lib/Optimizer/Builder/CMakeLists.txt

@@ -50,6 +50,7 @@ add_flang_library(FIRBuilder
   FIRDialectSupport
   FIRSupport
   FortranEvaluate
+  FortranSupport
   HLFIRDialect
 
   MLIR_DEPS

flang/lib/Optimizer/HLFIR/Transforms/CMakeLists.txt

@@ -27,6 +27,8 @@ add_flang_library(HLFIRTransforms
   FIRSupport
   FIRTransforms
   FlangOpenMPTransforms
+  FortranEvaluate
+  FortranSupport
   HLFIRDialect
 
   LINK_COMPONENTS

openmp/runtime/src/CMakeLists.txt

@@ -168,7 +168,7 @@ endif()
 # Disable libstdc++ assertions, even in an LLVM_ENABLE_ASSERTIONS build, to
 # avoid an unwanted dependency on libstdc++.so.
 if(NOT WIN32)
-  add_definitions(-U_GLIBCXX_ASSERTIONS)
+  add_definitions(-U_GLIBCXX_ASSERTIONS -D_GLIBCXX_NO_ASSERTIONS)
 endif()
 
 # Add the OpenMP library