build: add autoconf auto-generation comment to input files

To note on the output files that they are generated and to clarify how they are generated. From the manual of GNU Autoconf (version 2.69): > -- Variable: configure_input > A comment saying that the file was generated automatically by > 'configure' and giving the name of the input file. 'AC_OUTPUT' > adds a comment line containing this variable to the top of every > makefile it creates. For other files, you should reference this > variable in a comment at the top of each input file. For > example, an input shell script should begin like this: > > #!/bin/sh > # @configure_input@ > > The presence of that line also reminds people editing the file > that it needs to be processed by 'configure' in order to be used. Resulting output on config.mk: # config.mk. Generated from config.mk.in by configure. Relates to netblue30#5140.
kmk3 · Jul 16, 2022 · 8fc604f · 8fc604f
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commit 8fc604f
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diff --git a/config.mk.in b/config.mk.in
@@ -1,3 +1,5 @@
+# @configure_input@
+#
 # Configure-time variable definitions and any other common definition that can
 # be safely included by all makefiles.
 #

diff --git a/config.sh.in b/config.sh.in
@@ -1,2 +1,3 @@
+# @configure_input@
 NAME=@PACKAGE_NAME@
 VERSION=@PACKAGE_VERSION@