mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
440157cbbe
Caused by2fcd8c1252. It used the documented pcre API -pcre_exec(NULL, NULL, NULL, -999, -999, 0, NULL, 0) to calculate the pcre stack frame size. Unfortunately, modern compilers broke it by cloning and inlining pcre match() function.2fcd8c1252tried to workaround it by setting the stack frame size to at least 500. It didn't work, 500 is not a universal constant. Now we fix our copy of pcre to not inline or clone match() - so that stack frame detection would work again - and detect at cmake time whether system pcre is broken or usable. Also use stack, not (much slower) malloc in bundled pcre, unless on Windows
28 lines
943 B
CMake
28 lines
943 B
CMake
INCLUDE (CheckCSourceRuns)
|
|
|
|
SET(WITH_PCRE "auto" CACHE STRING
|
|
"Which pcre to use (possible values are 'bundled', 'system', or 'auto')")
|
|
|
|
MACRO (CHECK_PCRE)
|
|
IF(WITH_PCRE STREQUAL "system" OR WITH_PCRE STREQUAL "auto")
|
|
CHECK_LIBRARY_EXISTS(pcre pcre_stack_guard "" HAVE_PCRE_STACK_GUARD)
|
|
IF(NOT CMAKE_CROSSCOMPILING)
|
|
SET(CMAKE_REQUIRED_LIBRARIES "pcre")
|
|
CHECK_C_SOURCE_RUNS("
|
|
#include <pcre.h>
|
|
int main() {
|
|
return -pcre_exec(NULL, NULL, NULL, -999, -999, 0, NULL, 0) < 256;
|
|
}" PCRE_STACK_SIZE_OK)
|
|
SET(CMAKE_REQUIRED_LIBRARIES)
|
|
ENDIF()
|
|
ENDIF()
|
|
IF(NOT HAVE_PCRE_STACK_GUARD OR NOT PCRE_STACK_SIZE_OK OR
|
|
WITH_PCRE STREQUAL "bundled")
|
|
IF (WITH_PCRE STREQUAL "system")
|
|
MESSAGE(FATAL_ERROR "system pcre is not found or unusable")
|
|
ENDIF()
|
|
SET(PCRE_INCLUDES ${CMAKE_BINARY_DIR}/pcre ${CMAKE_SOURCE_DIR}/pcre)
|
|
ADD_SUBDIRECTORY(pcre)
|
|
ENDIF()
|
|
ENDMACRO()
|
|
|