libnotmuch: build symbols list without relying on gcc -aux-info.

Carl reports "gcc -aux-info notmuch.aux lib/notmuch.h" does not
generate notmuch.aux for him with Debian gcc 4.6.0-8. A small
modification of the original sed regular expression allows us to work
directly from lib/notmuch.h, rather than preprocessing with gcc.

As with most such simple regex based "parsing", this is quite
sensitive to the input format, and needs that each symbol to be
exported from libnotmuch should

- start with "notmuch_"
- be the first non-whitespace token on the line
- be followed by an open parenthesis.

(Cherry-picked from 51b7ab69687, with conflicts resolved by db)

diff --git a/lib/Makefile.local b/lib/Makefile.local
index 4676504cd0f910542798b908a61ea65ce3f84c59..7e2bc87be147734d0750ee345ac51556e9320575 100644 (file)
--- a/lib/Makefile.local
+++ b/lib/Makefile.local
@@ -76,9 +76,8 @@ $(dir)/$(LIBNAME): $(libnotmuch_modules) notmuch.sym
        $(call quiet,CXX $(CXXFLAGS)) $(libnotmuch_modules) $(FINAL_LIBNOTMUCH_LDFLAGS) $(LIBRARY_LINK_FLAG) -o $@
 
 notmuch.sym: lib/notmuch.h
-       gcc -aux-info notmuch.aux $<
        printf "{\nglobal:\n" > notmuch.sym
-       sed  -n 's/.*\(notmuch_[a-z_]*\) (.*/\t\1;/p' notmuch.aux >> notmuch.sym
+       sed  -n 's/^\s*\(notmuch_[a-z_]*\)\s*(.*/\t\1;/p' $< >> notmuch.sym
        printf "local: *;\n};\n" >> notmuch.sym
 
 $(dir)/$(SONAME): $(dir)/$(LIBNAME)
@@ -103,4 +102,4 @@ install-$(dir): $(dir)/$(LIBNAME)
        $(LIBRARY_INSTALL_POST_COMMAND)
 
 SRCS  := $(SRCS) $(libnotmuch_c_srcs) $(libnotmuch_cxx_srcs)
-CLEAN := $(CLEAN) $(libnotmuch_modules) $(dir)/$(SONAME) $(dir)/$(LINKER_NAME) $(dir)$(LIBNAME) libnotmuch.a notmuch.aux notmuch.sym
+CLEAN := $(CLEAN) $(libnotmuch_modules) $(dir)/$(SONAME) $(dir)/$(LINKER_NAME) $(dir)$(LIBNAME) libnotmuch.a notmuch.sym