build-sys: hide magic section variables from exported symbols

https://github.com/systemd/systemd/issues/234

diff --git a/Makefile.am b/Makefile.am
index 1dd6dbd5e5af31c5dca4a3cb299414700eedb0ca..2a79a2a68333569fd9cb60242a894743396674f2 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -3460,10 +3460,6 @@ libudev_la_SOURCES =\
        src/libudev/libudev-queue.c \
        src/libudev/libudev-hwdb.c
 
-libudev_la_CFLAGS = \
-       $(AM_CFLAGS) \
-       -fvisibility=hidden
-
 libudev_la_LDFLAGS = \
        $(AM_LDFLAGS) \
        -version-info $(LIBUDEV_CURRENT):$(LIBUDEV_REVISION):$(LIBUDEV_AGE) \
@@ -3495,10 +3491,6 @@ noinst_LTLIBRARIES += \
 libudev_internal_la_SOURCES =\
        $(libudev_la_SOURCES)
 
-libudev_internal_la_CFLAGS = \
-       $(AM_CFLAGS) \
-       -fvisibility=default
-
 # ------------------------------------------------------------------------------
 INSTALL_DIRS += \
        $(sysconfdir)/udev/rules.d
@@ -5539,8 +5531,7 @@ pam_systemd_la_SOURCES = \
 
 pam_systemd_la_CFLAGS = \
        $(AM_CFLAGS) \
-       $(PAM_CFLAGS) \
-       -fvisibility=hidden
+       $(PAM_CFLAGS)
 
 pam_systemd_la_LDFLAGS = \
        $(AM_LDFLAGS) \

diff --git a/src/libsystemd/sd-bus/bus-error.c b/src/libsystemd/sd-bus/bus-error.c
index dac157be166a851123809239baf34941ad46c8bf..64a5a972aef719637fdf9e527eb094ae3797bdea 100644 (file)
--- a/src/libsystemd/sd-bus/bus-error.c
+++ b/src/libsystemd/sd-bus/bus-error.c
@@ -70,9 +70,11 @@ BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_standard_errors[] = {
         SD_BUS_ERROR_MAP_END
 };
 
-/* GCC maps this magically to the beginning and end of the BUS_ERROR_MAP section */
-extern const sd_bus_error_map __start_BUS_ERROR_MAP[];
-extern const sd_bus_error_map __stop_BUS_ERROR_MAP[];
+/* GCC maps this magically to the beginning and end of the BUS_ERROR_MAP section.
+ * Hide them; for currently unknown reasons they get exported to the shared libries
+ * even without being listed in the sym file. */
+extern const sd_bus_error_map __start_BUS_ERROR_MAP[] _hidden_;
+extern const sd_bus_error_map __stop_BUS_ERROR_MAP[] _hidden_;
 
 /* Additional maps registered with sd_bus_error_add_map() are in this
  * NULL terminated array */