diff --git a/CMakeLists.txt b/CMakeLists.txt index f8e7e84..02b9785 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -107,6 +107,9 @@ if (HAS_NO_FORMAT_TRUNCATION) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-format-truncation") endif() +include (CheckSymbolExists) +check_symbol_exists("__GLIBC__" "stdlib.h" LIBC_IS_GLIBC) + if (MSVC) # Turn off Microsofts "security" warnings. add_definitions( "/W3 /D_CRT_SECURE_NO_WARNINGS /wd4005 /wd4996 /nologo" ) @@ -366,6 +369,10 @@ if(JANSSON_BUILD_SHARED_LIBS) ${JANSSON_HDR_PUBLIC} src/jansson.def) + if (LIBC_IS_GLIBC) + set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--default-symver") + endif() + set_target_properties(jansson PROPERTIES VERSION ${JANSSON_VERSION} SOVERSION ${JANSSON_SOVERSION}) diff --git a/configure.ac b/configure.ac index d923eef..3a4d187 100644 --- a/configure.ac +++ b/configure.ac @@ -137,6 +137,10 @@ fi AS_IF([test "x$with_Bsymbolic" = "xyes"], [JSON_BSYMBOLIC_LDFLAGS=-Wl[,]-Bsymbolic-functions]) AC_SUBST(JSON_BSYMBOLIC_LDFLAGS) +# Enable symbol versioning on GNU libc +JSON_SYMVER_LDFLAGS= +AC_CHECK_DECL([__GLIBC__], [JSON_SYMVER_LDFLAGS=-Wl,--default-symver]) +AC_SUBST([JSON_SYMVER_LDFLAGS]) AC_ARG_ENABLE([ossfuzzers], [AS_HELP_STRING([--enable-ossfuzzers], diff --git a/src/Makefile.am b/src/Makefile.am index 91280c8..c61d199 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -26,4 +26,5 @@ libjansson_la_LDFLAGS = \ -no-undefined \ -export-symbols-regex '^json_|^jansson_' \ -version-info 17:0:13 \ + @JSON_SYMVER_LDFLAGS@ \ @JSON_BSYMBOLIC_LDFLAGS@