build-sys: parallelize 'exported' target

diff --git a/.gitignore b/.gitignore
index eeb373f..458cea5 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 /defined
 /undefined
 /exported
+/exported-*
 /TAGS
 /accelerometer
 /ata_id

diff --git a/Makefile.am b/Makefile.am
index f4bfe66..f2d7a69 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -4667,10 +4667,11 @@ valgrind-tests: $(TESTS)
                libtool --mode=execute valgrind -q --leak-check=full --max-stackframe=4194400 --error-exitcode=55 $(builddir)/$$f ; \
        done
 
-exported: $(lib_LTLIBRARIES)
-       $(AM_V_GEN)for f in $(lib_LTLIBRARIES:.la=.so) ; do \
-               nm -g --defined-only $(builddir)/.libs/"$$f" 2>&1 /dev/null | grep " T " | cut -d" " -f3 ; \
-       done > $@
+exported-%: %
+       $(AM_V_GEN)nm -g --defined-only $(builddir)/.libs/$(<:.la=.so) 2>&1 /dev/null | grep " T " | cut -d" " -f3 > $@
+
+exported: $(addprefix exported-, $(lib_LTLIBRARIES))
+       $(AM_V_GEN)cat $^ > $@
 
 check-api-docs: exported man
        $(AM_V_GEN)for symbol in `cat exported` ; do \