Restrict configuration of the JIT SELinux compatible memory allocator to Linux

and NetBSD.

CMakeLists.txt

@@ -200,8 +200,12 @@ SET(PCRE2_HEAP_MATCH_RECURSE OFF CACHE BOOL
 SET(PCRE2_SUPPORT_JIT OFF CACHE BOOL
     "Enable support for Just-in-time compiling.")
 
+IF(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)
     SET(PCRE2_SUPPORT_JIT_SEALLOC OFF CACHE BOOL
         "Enable SELinux compatible execmem allocator in JIT (experimental).")
+ELSE(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)       
+    SET(PCRE2_SUPPORT_JIT_SEALLOC IGNORE)              
+ENDIF(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)
 
 SET(PCRE2GREP_SUPPORT_JIT ON CACHE BOOL
     "Enable use of Just-in-time compiling in pcre2grep.")
@@ -331,8 +335,12 @@ IF(PCRE2_SUPPORT_JIT_SEALLOC)
 	CHECK_SYMBOL_EXISTS(mkostemp stdlib.h REQUIRED) 
         UNSET(CMAKE_REQUIRED_DEFINITIONS)
         IF(${REQUIRED})
+                IF(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)          
                         ADD_DEFINITIONS(-D_GNU_SOURCE)
                         SET(SLJIT_PROT_EXECUTABLE_ALLOCATOR 1)
+                ELSE(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)
+                        MESSAGE(FATAL_ERROR "Your configuration is not supported")
+                ENDIF(${CMAKE_SYSTEM_NAME} MATCHES Linux|NetBSD)
         ELSE(${REQUIRED})
                 SET(PCRE2_SUPPORT_JIT_SEALLOC OFF)
         ENDIF(${REQUIRED})

ChangeLog

@@ -120,6 +120,9 @@ does). Patch by Carlo Marcelo Arenas Belon.
 29. Check for the existence of memfd_create in both CMake and configure 
 configurations. Patch by Carlo Marcelo Arenas Belon.
 
+30. Restrict the configuration setting for the SELinux compatible execmem 
+allocator (change 10.30/44) to Linux and NetBSD.
+
 
 Version 10.34 21-November-2019
 ------------------------------

configure.ac

@@ -176,11 +176,18 @@ if test "$enable_jit" = "auto"; then
   echo checking for JIT support on this hardware... $enable_jit
 fi
 
-# Handle --enable-jit-sealloc (disabled by default)
+# Handle --enable-jit-sealloc (disabled by default and only experimental)
+case $host_os in                                     
+  linux* | netbsd*)         
     AC_ARG_ENABLE(jit-sealloc,
       AS_HELP_STRING([--enable-jit-sealloc],
         [enable SELinux compatible execmem allocator in JIT (experimental)]),
         ,enable_jit_sealloc=no)
+    ;;
+  *)
+    enable_jit_sealloc=unsupported
+    ;;
+esac
 
 # Handle --disable-pcre2grep-jit (enabled by default)
 AC_ARG_ENABLE(pcre2grep-jit,