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[flang-rt] Added FLANG_RT_QUADMATH_INCLUDE_DIR option. #130378

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[flang-rt] Added FLANG_RT_QUADMATH_INCLUDE_DIR option. #130378

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6 changes: 6 additions & 0 deletions flang-rt/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -141,6 +141,12 @@ CMake itself provide.
the compiler for `__float128` or 128-bit `long double` support.
[More details](docs/Real16MathSupport.md).

* `FLANG_RT_QUADMATH_INCLUDE_DIR` (default: `""`)

Allows setting a path to `quadmath.h` directory.
It may be required when using non-gcc compiler for building flang-rt.
It maye also be required when building flang-rt in bootstrap mode.

* `FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT` (values: `"CUDA"`,`"OpenMP"`, `""` default: `""`)

When set to `CUDA`, builds Flang-RT with experimental support for GPU
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7 changes: 7 additions & 0 deletions flang-rt/lib/quadmath/CMakeLists.txt
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Expand Up @@ -76,8 +76,15 @@ target_include_directories(FortranFloat128MathILib INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/..>
)

set(FLANG_RT_QUADMATH_INCLUDE_DIR "" CACHE PATH
"An optional path to GNU libquadmath header files. \
It may be required when building with FLANG_RUNTIME_F128_MATH_LIB \
and a non-gcc compiler.")

if (FLANG_RUNTIME_F128_MATH_LIB)
if (${FLANG_RUNTIME_F128_MATH_LIB} STREQUAL "libquadmath")
include_directories(${FLANG_RT_QUADMATH_INCLUDE_DIR})
list(APPEND CMAKE_REQUIRED_INCLUDES ${FLANG_RT_QUADMATH_INCLUDE_DIR})
check_include_file(quadmath.h FOUND_QUADMATH_HEADER)
if(FOUND_QUADMATH_HEADER)
add_compile_definitions(HAS_QUADMATHLIB)
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