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build: support amdflang (LLVMFlang) CPU builds via non-PIE link #1635

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Merged
sbryngelson merged 1 commit into from
Jul 9, 2026
+14 −0
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build: support amdflang (LLVMFlang) CPU builds via non-PIE link #1635

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14 changes: 14 additions & 0 deletions cmake/GPU.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,20 @@ elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "Flang")
if (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "RelDebug")
add_compile_options($<$<COMPILE_LANGUAGE:Fortran>:-O1> $<$<COMPILE_LANGUAGE:Fortran>:-g>)
endif()
elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "LLVMFlang")
# AMD/LLVM flang (amdflang). These are CPU-build flags only; the OpenMP-offload GPU
# build sets its own flags (MFCTargets.cmake) and links via the offload wrapper, so
# it is left untouched here.
if (NOT (MFC_OpenMP OR MFC_OpenACC))
if (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "RelDebug")
# Ordinary (non-LTO) objects plus static deps built without -fPIC
# (e.g. libfftw3) hit ld.lld's default-PIE "relocation R_X86_64_32
# against local symbol". Link a non-PIE executable to accept them.
# Release links fine via LTO's link-time PIC codegen, so it is left alone.
add_link_options(-no-pie)
add_compile_options($<$<COMPILE_LANGUAGE:Fortran>:-O1> $<$<COMPILE_LANGUAGE:Fortran>:-g>)
endif()
endif()
elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
add_compile_options($<$<COMPILE_LANGUAGE:Fortran>:-free>)

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