maint.mk: allow package-specific header to provide <config.h>

* top/maint.mk (sc_require_config_h): New variable.
(sc_require_config_h, sc_require_config_h_first): Use it.

Signed-off-by: Eric Blake <ebb9@byu.net>

diff --git a/ChangeLog b/ChangeLog
index 3126a87..1c0d6a3 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-04-27  Eric Blake  <ebb9@byu.net>
+
+       maint.mk: allow package-specific header to provide <config.h>
+       * top/maint.mk (sc_require_config_h): New variable.
+       (sc_require_config_h, sc_require_config_h_first): Use it.
+
 2009-04-27  Simon Josefsson  <simon@josefsson.org>
 
        * top/maint.mk (sc_avoid_if_before_free): Except

diff --git a/top/maint.mk b/top/maint.mk
index 2873878..b7f6868 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -191,10 +191,13 @@ sc_prohibit_have_config_h:
          { echo '$(ME): found use of HAVE''_CONFIG_H; remove'          \
                1>&2; exit 1; } || :
 
-# Nearly all .c files must include <config.h>.
+# Nearly all .c files must include <config.h>.  However, we also permit this
+# via inclusion of a package-specific header, if cfg.mk specified one.
+# config_h_header must be suitable for grep -E.
+config_h_header ?= <config\.h>
 sc_require_config_h:
-       @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then               \
-         grep -L '^# *include <config\.h>'                             \
+       @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then       \
+         grep -EL '^# *include $(config_h_header)'                     \
                $$($(VC_LIST_EXCEPT) | grep '\.c$$')                    \
              | grep . &&                                               \
          { echo '$(ME): the above files do not include <config.h>'     \
@@ -203,12 +206,13 @@ sc_require_config_h:
        fi
 
 # You must include <config.h> before including any other header file.
+# This can possibly be via a package-specific header, if given by cfg.mk.
 sc_require_config_h_first:
        @if $(VC_LIST_EXCEPT) | grep -l '\.c$$' > /dev/null; then       \
          fail=0;                                                       \
          for i in $$($(VC_LIST_EXCEPT) | grep '\.c$$'); do             \
            grep '^# *include\>' $$i | sed 1q                           \
-               | grep '^# *include <config\.h>' > /dev/null            \
+               | grep -E '^# *include $(config_h_header)' > /dev/null  \
              || { echo $$i; fail=1; };                                 \
          done;                                                         \
          test $$fail = 1 &&                                            \