cmake HAVE_DECL_BACKTRACE examples

SwagSoftware/Kisak-Strike thirdparty/gperftools-2.8.1/CMakeLists.txt :442

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

ucla-vision/xivo thirdparty/gperftools/CMakeLists.txt :395

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

p4lang/open-p4studio pkgsrc/target-syslibs/third-party/gperftools/CMakeLists.txt :395

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

percona/percona-server extra/gperftools/gperftools-2.15/CMakeLists.txt :420

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

logicalclocks/rondb extra/gperftools/gperftools-2.15/CMakeLists.txt :420

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

percona/percona-xtrabackup extra/gperftools/gperftools-2.15/CMakeLists.txt :420

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

percona/percona-xtradb-cluster extra/gperftools/gperftools-2.15/CMakeLists.txt :420

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

gperftools/gperftools CMakeLists.txt :300

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)

mysql/mysql-server extra/gperftools/gperftools-2.15/CMakeLists.txt :420

check_symbol_exists("backtrace" "execinfo.h" HAVE_DECL_BACKTRACE)