Merge topic 'update-expat'

0998f6396a Merge branch 'upstream-expat' into update-expat
ba13dc2aa8 expat 2019-06-19 (d3b78b42)
7449c63f3e expat: Update script to get Expat 2.2.7

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3501

1 files changed, 30 insertions, 5 deletions

diff --git a/Utilities/cmexpat/ConfigureChecks.cmake b/Utilities/cmexpat/ConfigureChecks.cmake
index 057cfa5..b2edc3e 100644
--- a/Utilities/cmexpat/ConfigureChecks.cmake
+++ b/Utilities/cmexpat/ConfigureChecks.cmake
@@ -1,6 +1,7 @@
+include(CheckCCompilerFlag)
+include(CheckCSourceCompiles)
 include(CheckIncludeFile)
 include(CheckIncludeFiles)
-include(CheckFunctionExists)
 include(CheckSymbolExists)
 include(TestBigEndian)
 
@@ -16,10 +17,21 @@ check_include_file("sys/stat.h" HAVE_SYS_STAT_H)
 check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
 check_include_file("unistd.h" HAVE_UNISTD_H)
 
-check_function_exists("getpagesize" HAVE_GETPAGESIZE)
-check_function_exists("bcopy" HAVE_BCOPY)
-check_symbol_exists("memmove" "string.h" HAVE_MEMMOVE)
-check_function_exists("mmap" HAVE_MMAP)
+check_symbol_exists("getpagesize" "unistd.h" HAVE_GETPAGESIZE)
+check_symbol_exists("mmap" "sys/mman.h" HAVE_MMAP)
+check_symbol_exists("getrandom" "sys/random.h" HAVE_GETRANDOM)
+
+if(USE_libbsd)
+    set(CMAKE_REQUIRED_LIBRARIES "${LIB_BSD}")
+    set(_bsd "bsd/")
+else()
+    set(_bsd "")
+endif()
+check_symbol_exists("arc4random_buf" "${_bsd}stdlib.h" HAVE_ARC4RANDOM_BUF)
+if(NOT HAVE_ARC4RANDOM_BUF)
+    check_symbol_exists("arc4random" "${_bsd}stdlib.h" HAVE_ARC4RANDOM)
+endif()
+set(CMAKE_REQUIRED_LIBRARIES)
 
 #/* Define to 1 if you have the ANSI C header files. */
 check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
@@ -40,5 +52,18 @@ else(HAVE_SYS_TYPES_H)
     set(SIZE_T "unsigned")
 endif(HAVE_SYS_TYPES_H)
 
+check_c_source_compiles("
+        #include <stdlib.h>  /* for NULL */
+        #include <unistd.h>  /* for syscall */
+        #include <sys/syscall.h>  /* for SYS_getrandom */
+        int main() {
+            syscall(SYS_getrandom, NULL, 0, 0);
+            return 0;
+        }"
+    HAVE_SYSCALL_GETRANDOM)
+
 configure_file(expat_config.h.cmake "${CMAKE_CURRENT_BINARY_DIR}/expat_config.h")
 add_definitions(-DHAVE_EXPAT_CONFIG_H)
+
+check_c_compiler_flag("-fno-strict-aliasing" FLAG_NO_STRICT_ALIASING)
+check_c_compiler_flag("-fvisibility=hidden" FLAG_VISIBILITY)