Some modern distros (Mageia, Mandriva) use -no-undefined as a default linker flag for building software. However, undefined symbols are OK if the binary being linked is a plugin. To detect plugins, build system looks for presence of "-module" libtool flag in makefiles.
There are two libraries in Pigeonhole that couldn't be linked with -no-undefined: src/lib-sieve/plugins/mailbox/libsieve_ext_mailbox.la src/lib-sieve/libdovecot-sieve.la These modules do contain undefined symbols, but they are not linked against library that provides them. It would be good if corresponding makefiles contained "-module" flags, so that build system could selectively turn off that -no-undefined linker flag. Please see proposed patch (attached). Thanks, Dimitri Mageia Linux packager
--- src/lib-sieve/Makefile.am~ 2012-09-18 23:25:44.000000000 +0400 +++ src/lib-sieve/Makefile.am 2012-12-22 05:45:24.504324809 +0400 @@ -72,6 +72,7 @@ libdovecot_sieve_la_DEPENDENCIES = $(plugins) $(LIBDOVECOT_LDA_DEPS) libdovecot_sieve_la_LIBADD = $(plugins) $(LIBDOVECOT) $(LIBDOVECOT_LDA) +libdovecot_sieve_la_LDFLAGS = -module libdovecot_sieve_la_SOURCES = \ rfc2822.c \ --- src/lib-sieve/plugins/mailbox/Makefile.am~ 2012-08-12 17:38:16.000000000 +0400 +++ src/lib-sieve/plugins/mailbox/Makefile.am 2012-12-22 05:44:52.116540024 +0400 @@ -15,5 +15,7 @@ $(tests) \ ext-mailbox.c +libsieve_ext_mailbox_la_LDFLAGS = -module + noinst_HEADERS = \ ext-mailbox-common.h
