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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| # Check for libfmt. | ||
| # If libfmt isn't found, extlib/libfmt/ will be used instead. | ||
|
|
||
| IF(NOT USE_INTERNAL_FMT) | ||
| IF(Fmt_LIBRARY MATCHES "^fmt$" OR Fmt_LIBRARY MATCHES "^fmt") | ||
| # Internal libfmt was previously in use. | ||
| UNSET(Fmt_FOUND) | ||
| UNSET(HAVE_Fmt) | ||
| UNSET(Fmt_LIBRARY CACHE) | ||
| UNSET(Fmt_LIBRARIES CACHE) | ||
| ENDIF() | ||
|
|
||
| # Check for libfmt. | ||
| # - libfmt-6.2.0: Introduced the 'L' format specifier. | ||
| # - Previously, 'n' was available. | ||
| # - The 'L' specifier matches C++20 std::format(). | ||
| # - libfmt-7.0.x: Has fixes for the 'L' format specifier; removed 'n'. | ||
| # - 'n' can be re-enabled with FMT_DEPRECATED_N_SPECIFIER. | ||
| # - libfmt-7.1.0: Has more fixes for the 'L' format specifier. | ||
| # - libfmt-8.0.0: Removes the 'n' format specifier entirely. | ||
| # | ||
| # Since we use the 'L' specifier, we will set a minimum of libfmt-7.1.0. | ||
| # Ubuntu 20.04 has libfmt-6.1.2; Ubuntu 22.04 has libfmt-8.1.1. | ||
| # Also, Ubuntu 20.04's libfmt is a static library. It was changed | ||
| # to a shared library sometime between 20.04 and 22.04. | ||
| FIND_PACKAGE(Fmt 7.1.0) | ||
| IF(Fmt_FOUND) | ||
| # Found system libfmt. | ||
| SET(HAVE_Fmt 1) | ||
| SET(Fmt_LIBRARY "fmt::fmt") | ||
| ELSE() | ||
| # System libfmt was not found. | ||
| MESSAGE(STATUS "Using the internal copy of libfmt since a system version was not found.") | ||
| SET(USE_INTERNAL_FMT ON CACHE BOOL "Use the internal copy of libfmt" FORCE) | ||
| ENDIF() | ||
| ELSE() | ||
| MESSAGE(STATUS "Using the internal copy of libfmt.") | ||
| ENDIF(NOT USE_INTERNAL_FMT) | ||
|
|
||
| IF(USE_INTERNAL_FMT) | ||
| # Using the internal libfmt library. | ||
| SET(Fmt_FOUND 1) | ||
| SET(HAVE_Fmt 1) | ||
| SET(Fmt_VERSION 11.1.2 CACHE INTERNAL "libfmt version" FORCE) | ||
| # FIXME: When was it changed from LIBRARY to LIBRARIES? | ||
| IF(WIN32 OR APPLE) | ||
| # Using DLLs on Windows and Mac OS X. | ||
| SET(USE_INTERNAL_FMT_DLL ON) | ||
| SET(Fmt_LIBRARY fmt::fmt CACHE INTERNAL "libfmt library" FORCE) | ||
| ELSE() | ||
| # Using static linking on other systems. | ||
| SET(USE_INTERNAL_FMT_DLL OFF) | ||
| SET(Fmt_LIBRARY fmt::fmt-header-only CACHE INTERNAL "libfmt library" FORCE) | ||
| ENDIF() | ||
| SET(Fmt_LIBRARIES ${Fmt_LIBRARY} CACHE INTERNAL "libfmt libraries" FORCE) | ||
| # FIXME: When was it changed from DIR to DIRS? | ||
| SET(Fmt_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/extlib/libfmt) | ||
| SET(Fmt_INCLUDE_DIRS ${Fmt_INCLUDE_DIR}) | ||
| ELSE(USE_INTERNAL_FMT) | ||
| SET(USE_INTERNAL_FMT_DLL OFF) | ||
| ENDIF(USE_INTERNAL_FMT) |
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