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CMake: Support bypassing auto-detection of syscall SYS_getrandom

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This commit is contained in:
Sebastian Pipping 2019-07-09 22:53:04 +02:00
parent 592528b6b3
commit dfef43bf9b
1 changed files with 11 additions and 0 deletions
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11
expat/CMakeLists.txt
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@ -61,6 +61,8 @@ endif()
if (NOT WIN32)
set(USE_GETRANDOM "AUTO" CACHE STRING
"Make use of getrandom function (ON|OFF|AUTO) [default=AUTO]")
set(USE_SYS_GETRANDOM "AUTO" CACHE STRING
"Make use of syscall SYS_getrandom (ON|OFF|AUTO) [default=AUTO]")
endif()
option(XML_UNICODE "Use UTF-16 encoded chars (two bytes) instead of UTF-8" OFF)
option(XML_UNICODE_WCHAR_T "Use wchar_t to represent UTF-16 instead of unsigned short" OFF)
@ -115,6 +117,15 @@ if(NOT WIN32)
message("Function getrandom was found but it will not be used due to USE_GETRANDOM=OFF.")
set(HAVE_GETRANDOM 0)
endif()
if(USE_SYS_GETRANDOM AND NOT (USE_SYS_GETRANDOM STREQUAL "AUTO") AND NOT HAVE_SYSCALL_GETRANDOM)
message(SEND_ERROR
"Use of syscall SYS_getrandom was enforced by USE_SYS_GETRANDOM=ON but it could not be found.")
elseif(NOT USE_SYS_GETRANDOM AND HAVE_SYSCALL_GETRANDOM)
message("Syscall SYS_getrandom was found but it will not be used due to USE_SYS_GETRANDOM=OFF.")
set(HAVE_SYSCALL_GETRANDOM 0)
endif()
endif()