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Add CMake variable FISH_USE_SYSTEM_PCRE2

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The CMake variable FISH_USE_SYSTEM_PCRE2 now controls whether fish uses
system PCRE2 or the bundled version. The default is to use the system
version, unless no such version is found, or unless it is a macOS build
with code signing. Note the default behavior has not changed.

Fixes #6952
This commit is contained in:
ridiculousfish
2020-04-28 13:07:03 -07:00
parent 2951c05934
commit b88b6ea504
2 changed files with 28 additions and 6 deletions
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33
cmake/PCRE2.cmake
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@@ -7,16 +7,37 @@ set(PCRE2_BUILD_TESTS OFF CACHE BOOL "Build tests")
set(PCRE2_BUILD_PCRE2GREP OFF CACHE BOOL "Build pcre2grep")
set(PCRE2_MIN_VERSION 10.21)
IF (NOT APPLE)
find_library(PCRE2_LIB pcre2-${PCRE2_WIDTH})
find_path(PCRE2_INCLUDE_DIR pcre2.h)
# Look for a system-installed PCRE2.
find_library(SYS_PCRE2_LIB pcre2-${PCRE2_WIDTH})
find_path(SYS_PCRE2_INCLUDE_DIR pcre2.h)
# We can either use the system-installed PCRE or our bundled version.
# This is controlled by the cache variable FISH_USE_SYSTEM_PCRE2.
# Here we compute the default value for that variable.
if ((APPLE) AND (MAC_CODESIGN_ID))
# On Mac, a codesigned fish will refuse to load a non-codesigned PCRE2
# (e.g. from Homebrew) so default to bundled PCRE2.
set(USE_SYS_PCRE2_DEFAULT OFF)
elseif((NOT SYS_PCRE2_LIB) OR (NOT SYS_PCRE2_INCLUDE_DIR))
# We did not find system PCRE2, so default to bundled.
set(USE_SYS_PCRE2_DEFAULT OFF)
else()
# Default to using the system PCRE2, which was found.
set(USE_SYS_PCRE2_DEFAULT ON)
endif()
IF (PCRE2_LIB AND PCRE2_INCLUDE_DIR)
message(STATUS "Found system PCRE2 library ${PCRE2_INCLUDE_DIR}")
set(FISH_USE_SYSTEM_PCRE2 ${USE_SYS_PCRE2_DEFAULT} CACHE BOOL
"Use PCRE2 from the system, instead of bundled with fish")
if(FISH_USE_SYSTEM_PCRE2)
set(PCRE2_LIB "${SYS_PCRE2_LIB}")
set(PCRE2_INCLUDE_DIR "${SYS_PCRE2_INCLUDE_DIR}")
message(STATUS "Using system PCRE2 library ${PCRE2_INCLUDE_DIR}")
else()
message(STATUS "Using bundled PCRE2 library")
add_subdirectory(pcre2 EXCLUDE_FROM_ALL)
set(PCRE2_INCLUDE_DIR ${CMAKE_BINARY_DIR}/pcre2)
set(PCRE2_LIB pcre2-${PCRE2_WIDTH})
endif(PCRE2_LIB AND PCRE2_INCLUDE_DIR)
endif(FISH_USE_SYSTEM_PCRE2)
include_directories(${PCRE2_INCLUDE_DIR})