build: Inline perl prototypes in sources

Prototypes allows us to avoid using the '&foo' invocation form when
invoking a subroutine before its definition.  Previously those
prototypes were generated to prevent them from falling out-of-sync
with actual definitions.  Now we provide a 'check-perl-protos' lint
script to ensure that this is not the case.  This has the same
benefits as generating prototypes while simplifying the
bootstrap/build process.

* bin/gen-perl-protos: Remove.
* bin/Makefile.inc: Adapt.
* bootstrap: Likewise.
* bin/aclocal.in: Inline prototypes.
* bin/automake.in: Likewise.
* maintainer/check-perl-protos: New lint script.
* maintainer/syntax-checks.mk (sc_perl_protos): New target.
(syntax_check_rules): Add it.

1 files changed, 20 insertions, 1 deletions

diff --git a/bin/aclocal.in b/bin/aclocal.in
index 738996f39..64fd66233 100644
--- a/bin/aclocal.in
+++ b/bin/aclocal.in
@@ -173,7 +173,26 @@ use constant SCAN_M4_DIRS_ERROR => 2;
 
 # Prototypes for all subroutines.
 
-#! Prototypes here will automatically be generated by the build system.
+sub add_file ($);
+sub add_macro ($);
+sub check_acinclude ();
+sub install_file ($$);
+sub list_compare (\@\@);
+sub parse_ACLOCAL_PATH ();
+sub parse_arguments ();
+sub reset_maps ();
+sub scan_configure ();
+sub scan_configure_dep ($);
+sub scan_file ($$$);
+sub scan_m4_dirs ($$@);
+sub scan_m4_files ();
+sub strip_redundant_includes (%);
+sub trace_used_macros ();
+sub unlink_tmp (;$);
+sub usage ($);
+sub version ();
+sub write_aclocal ($@);
+sub xmkdir_p ($);
 
 ################################################################