[Bug lto/49664] liblto_plugin.so exports too many symbols

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49664

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am going to test this change:
diff --git a/lto-plugin/Makefile.am b/lto-plugin/Makefile.am
index 8b20e1d1d87..704b0c35b70 100644
--- a/lto-plugin/Makefile.am
+++ b/lto-plugin/Makefile.am
@@ -21,7 +21,8 @@ in_gcc_libs = $(foreach lib, $(libexecsub_LTLIBRARIES),
$(gcc_build_dir)/$(lib))
 liblto_plugin_la_SOURCES = lto-plugin.c
 # Note that we intentionally override the bindir supplied by
ACX_LT_HOST_FLAGS.
 liblto_plugin_la_LDFLAGS = $(AM_LDFLAGS) \
-       $(lt_host_flags) -module -avoid-version -bindir $(libexecsubdir)
+       $(lt_host_flags) -module -avoid-version -bindir $(libexecsubdir) \
+       -export-symbols-regex oncall
 # Can be simplified when libiberty becomes a normal convenience library.
 libiberty = $(with_libiberty)/libiberty.a
 libiberty_noasan = $(with_libiberty)/noasan/libiberty.a
diff --git a/lto-plugin/Makefile.in b/lto-plugin/Makefile.in
index 20611c6b1e6..f59d7ffcea9 100644
--- a/lto-plugin/Makefile.in
+++ b/lto-plugin/Makefile.in
@@ -323,6 +323,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 real_target_noncanonical = @real_target_noncanonical@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -350,9 +351,9 @@ libexecsub_LTLIBRARIES = liblto_plugin.la
 in_gcc_libs = $(foreach lib, $(libexecsub_LTLIBRARIES),
$(gcc_build_dir)/$(lib))
 liblto_plugin_la_SOURCES = lto-plugin.c
 # Note that we intentionally override the bindir supplied by
ACX_LT_HOST_FLAGS.
-liblto_plugin_la_LDFLAGS = $(AM_LDFLAGS) $(lt_host_flags) -module
-avoid-version \
-       -bindir $(libexecsubdir) $(if $(wildcard \
-       $(libiberty_noasan)),, $(if $(wildcard \
+liblto_plugin_la_LDFLAGS = $(AM_LDFLAGS) $(lt_host_flags) -module \
+       -avoid-version -bindir $(libexecsubdir) -export-symbols-regex \
+       oncall $(if $(wildcard $(libiberty_noasan)),, $(if $(wildcard \
        $(libiberty_pic)),,-Wc,$(libiberty)))
 # Can be simplified when libiberty becomes a normal convenience library.
 libiberty = $(with_libiberty)/libiberty.a


----- CUT ------
-export-symbols-regex is documented here
https://www.gnu.org/software/libtool/manual/html_node/Link-mode.html

Since we only need to export oncall and we already use libtool there is not
much to be done.