Revert "[Libomp] Place generated OpenMP headers into build resource d… (#88083)

…irectory (#88007)"

This reverts commit 8671429.

This commit broke the flang build, so I'm reverting it. See the comments
in merge request #88007 for more information.

Author: psteinfeld

clang/test/Headers/Inputs/include/stdint.h

@@ -16,12 +16,4 @@ typedef unsigned __INTPTR_TYPE__ uintptr_t;
 #error Every target should have __INTPTR_TYPE__
 #endif
 
-#ifdef __INTPTR_MAX__
-#define  INTPTR_MAX    __INTPTR_MAX__
-#endif
-
-#ifdef __UINTPTR_MAX__
-#define UINTPTR_MAX   __UINTPTR_MAX__
-#endif
-
 #endif /* STDINT_H */

openmp/runtime/src/CMakeLists.txt

@@ -10,19 +10,12 @@
 
 include(ExtendPath)
 
-# The generated headers will be placed in clang's resource directory if present.
-if(${OPENMP_STANDALONE_BUILD})
-  set(LIBOMP_HEADERS_INTDIR ${CMAKE_CURRENT_BINARY_DIR})
-else()
-  set(LIBOMP_HEADERS_INTDIR ${LLVM_BINARY_DIR}/${LIBOMP_HEADERS_INSTALL_PATH})
-endif()
-
 # Configure omp.h, kmp_config.h and omp-tools.h if necessary
-configure_file(${LIBOMP_INC_DIR}/omp.h.var ${LIBOMP_HEADERS_INTDIR}/omp.h @ONLY)
-configure_file(${LIBOMP_INC_DIR}/ompx.h.var ${LIBOMP_HEADERS_INTDIR}/ompx.h @ONLY)
-configure_file(kmp_config.h.cmake ${LIBOMP_HEADERS_INTDIR}/kmp_config.h @ONLY)
+configure_file(${LIBOMP_INC_DIR}/omp.h.var omp.h @ONLY)
+configure_file(${LIBOMP_INC_DIR}/ompx.h.var ompx.h @ONLY)
+configure_file(kmp_config.h.cmake kmp_config.h @ONLY)
 if(${LIBOMP_OMPT_SUPPORT})
-  configure_file(${LIBOMP_INC_DIR}/omp-tools.h.var ${LIBOMP_HEADERS_INTDIR}/omp-tools.h @ONLY)
+  configure_file(${LIBOMP_INC_DIR}/omp-tools.h.var omp-tools.h @ONLY)
 endif()
 
 # Generate message catalog files: kmp_i18n_id.inc and kmp_i18n_default.inc
@@ -426,15 +419,15 @@ else()
 endif()
 install(
   FILES
-  ${LIBOMP_HEADERS_INTDIR}/omp.h
-  ${LIBOMP_HEADERS_INTDIR}/ompx.h
+  ${CMAKE_CURRENT_BINARY_DIR}/omp.h
+  ${CMAKE_CURRENT_BINARY_DIR}/ompx.h
   DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH}
 )
 if(${LIBOMP_OMPT_SUPPORT})
-  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH})
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH})
   # install under legacy name ompt.h
-  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h)
-  set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${LIBOMP_HEADERS_INTDIR} PARENT_SCOPE)
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h)
+  set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR} PARENT_SCOPE)
 endif()
 if(${BUILD_FORTRAN_MODULES})
   set (destination ${LIBOMP_HEADERS_INSTALL_PATH})