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Add option for position independent code in CMake #930

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Mar 29, 2022
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Add option for position independent code in CMake #930

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7 changes: 4 additions & 3 deletions CMAKE_INSTRUCTIONS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -43,9 +43,10 @@ By default, FMS is built without `OpenMP` and in `single precision (r4)`

The following build options are available:
```
-DOPENMP "Build FMS with OpenMP support" DEFAULT: OFF
-D32BIT "Build 32-bit (r4) FMS library" DEFAULT: ON
-D64BIT "Build 64-bit (r8) FMS library" DEFAULT: OFF
-DOPENMP "Build FMS with OpenMP support" DEFAULT: OFF
-D32BIT "Build 32-bit (r4) FMS library" DEFAULT: ON
-D64BIT "Build 64-bit (r8) FMS library" DEFAULT: OFF
-DFPIC "Build with position independent code" DEFAULT: OFF

-DINTERNAL_FILE_NML "Enable compiler definition -DINTERNAL_FILE_NML" DEFAULT: ON
-DENABLE_QUAD_PRECISION "Enable compiler definition -DENABLE_QUAD_PRECISION" DEFAULT: ON
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12 changes: 9 additions & 3 deletions CMakeLists.txt
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Expand Up @@ -52,9 +52,10 @@ endif()
list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

# Build options
option(OPENMP "Build FMS with OpenMP support" OFF)
option(32BIT "Build 32-bit (r4) FMS library" ON)
option(64BIT "Build 64-bit (r8) FMS library" OFF)
option(OPENMP "Build FMS with OpenMP support" OFF)
option(32BIT "Build 32-bit (r4) FMS library" ON)
option(64BIT "Build 64-bit (r8) FMS library" OFF)
option(FPIC "Build with position independent code" OFF)

# Options for compiler definitions
option(INTERNAL_FILE_NML "Enable compiler definition -DINTERNAL_FILE_NML" ON)
Expand Down Expand Up @@ -89,6 +90,11 @@ if (WITH_YAML)
include_directories(${LIBYAML_INCLUDE_DIR})
endif ()

# Enables position independent code (i.e., -fPIC)
if (FPIC)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
endif ()

# Collect FMS Fortran source files
list(APPEND fms_fortran_src_files
affinity/fms_affinity.F90
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