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Expose headers depending on special configuration option #2651

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Dec 19, 2021
Merged

Expose headers depending on special configuration option #2651

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9 changes: 7 additions & 2 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,7 @@ option(FMT_FUZZ "Generate the fuzz target." OFF)
option(FMT_CUDA_TEST "Generate the cuda-test target." OFF)
option(FMT_OS "Include core requiring OS (Windows/Posix) " ON)
option(FMT_MODULE "Build a module instead of a traditional library." OFF)
option(FMT_SYSTEM_HEADERS "Expose headers with marking them as system." OFF)

set(FMT_CAN_MODULE OFF)
if (CMAKE_CXX_STANDARD GREATER 17 AND
Expand All @@ -96,6 +97,10 @@ if (FMT_TEST AND FMT_MODULE)
# The tests require {fmt} to be compiled as traditional library
message(STATUS "Testing is incompatible with build mode 'module'.")
endif ()
set(FMT_SYSTEM_HEADERS_ATTRIBUTE "")
if (FMT_SYSTEM_HEADERS)
set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
endif ()

# Get version from core.h
file(READ include/fmt/core.h core_h)
Expand Down Expand Up @@ -262,7 +267,7 @@ endif ()

target_compile_features(fmt INTERFACE ${FMT_REQUIRED_FEATURES})

target_include_directories(fmt PUBLIC
target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:${FMT_INC_DIR}>)

Expand Down Expand Up @@ -298,7 +303,7 @@ add_library(fmt::fmt-header-only ALIAS fmt-header-only)
target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)
target_compile_features(fmt-header-only INTERFACE ${FMT_REQUIRED_FEATURES})

target_include_directories(fmt-header-only INTERFACE
target_include_directories(fmt-header-only ${FMT_SYSTEM_HEADERS_ATTRIBUTE} INTERFACE
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:${FMT_INC_DIR}>)

Expand Down