From: Thien-Thi Nguyen <ttn@gnuvola.org>
Date: Wed, 9 Apr 2003 11:50:50 +0000 (+0000)
Subject: Initial revision
X-Git-Tag: ttn-vms-21-2-B4~10571
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=564b85ecca79fcf0a003cf55cae0749cc0a1064b;p=emacs.git

Initial revision
---

diff --git a/admin/notes/cpp b/admin/notes/cpp
new file mode 100644
index 00000000000..6815b88cccb
--- /dev/null
+++ b/admin/notes/cpp
@@ -0,0 +1,18 @@
+ttn 2003-04-09
+
+we use a C preprocesor not only in the normal compilation of .c files
+into object files, but also for creating
+
+	src/Makefile
+	lib-src/Makefile
+
+(delimited by comment "start of cpp stuff").  some cpp implementations
+insert whitespace in between tokens, which explains the "$(dot)$(dot)"
+and "UNEXEC_ALIAS" workarounds for unixoid systems and the bundled
+tradcpp/ for vms.  [NOTE: tradcpp/ not yet checked in.]
+
+during makefile creation, the preprocessor symbol NOT_C_CODE is defined.
+this should not be defined for normal .c file compilation.
+
+there has been discussion on eliminating this use of cpp and relying
+solely on autoconf processing.  rms says to leave it be.