[PATCH] maint.mk: let po check work in VPATH build

[Eric Blake]

* top/maint.mk (po_file): Allow cfg.mk override.
(sc_po_check): Allow VPATH use.
Reported by Jiri Denemark.

Signed-off-by: Eric Blake <address@hidden>
---

> I'll be pushing a patch shortly...

 ChangeLog    |    7 +++++++
 top/maint.mk |    6 +++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 917e834..01544bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-03-18  Eric Blake  <address@hidden>
+
+       maint.mk: let po check work in VPATH build
+       * top/maint.mk (po_file): Allow cfg.mk override.
+       (sc_po_check): Allow VPATH use.
+       Reported by Jiri Denemark.
+
 2011-03-16  Jim Meyering  <address@hidden>

        maint.mk: allow fine-grained syntax-check exclusion via Make variables
diff --git a/top/maint.mk b/top/maint.mk
index 1df8c7a..6dde022 100644
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -955,13 +955,13 @@ fix_po_file_diag = \
 apply the above patch\n'

 # Verify that all source files using _() are listed in po/POTFILES.in.
-po_file = po/POTFILES.in
+po_file ?= $(srcdir)/po/POTFILES.in
 sc_po_check:
        @if test -f $(po_file); then                                    \
          grep -E -v '^(#|$$)' $(po_file)                               \
            | grep -v '^src/false\.c$$' | sort > address@hidden;                
        \
          files=;                                                       \
-         for file in $$($(VC_LIST_EXCEPT)) lib/*.[ch]; do              \
+         for file in $$($(VC_LIST_EXCEPT)) $(srcdir)lib/*.[ch]; do     \
            test -r $$file || continue;                                 \
            case $$file in                                              \
              *.m4|*.mk) continue ;;                                    \
@@ -976,7 +976,7 @@ sc_po_check:
            files="$$files $$file";                                     \
          done;                                                         \
          grep -E -l '\b(N?_|gettext *)\([^)"]*("|$$)' $$files          \
-           | sort -u > address@hidden;                                         
\
+           | sort -u | sed 's|^$(_dot_escaped_srcdir)/||' > address@hidden;    
\
          diff -u -L $(po_file) -L $(po_file) address@hidden address@hidden     
                \
            || { printf '$(ME): '$(fix_po_file_diag) 1>&2; exit 1; };   \
          rm -f address@hidden address@hidden;                                  
        \
-- 
1.7.4