Emacs 22.3无法在Ubuntu 12.04上编译

Question

I downloaded emacs 22.3 from

http://ftp.gnu.org/pub/gnu/emacs/emacs-22.3.tar.gz

onto my Ubuntu 12.04.2 LTS desktop and compile/make doesn't work.

Configure seems to work fine.

Make fails very early on: in subdirectory lib-src there's a problem on line 148 of the makefile. And it does look like a problem:

ALL_CFLAGS = -D_BSD_SOURCE -DHAVE_CONFIG_H
          -I. -I../src -I${srcdir} -I${srcdir}/../src ${LDFLAGS} ${CPPFLAGS} ${CFLAGS}

That's lines 147 and 148: line 148 is supposed to be a continuation of line 147 I guess. It begins with a tab. No \\ at the end of line 147. I put one in and tried again. I got an error on line 150. I put in another \\ . A few lines later things got a bit more serious, where absence of \\ actually resulted in things that weren't syntax errors but made make break in more subtle ways.

I shouldn't be editing Makefiles anyway (I can tell, their permissions were read-only ;-) ). What am I doing wrong? I could persevere, but if I could instead eg feed a flag to make to eg run in emacs-22.3-makefile-compatibility mode, that would be much better.

[for those wondering "why" -- I have some scripts which I need for my work, and they have never worked in emacs >=23; on my old machine I just compiled emacs22 myself no problem, but on this new Ubuntu machine I have no emacs22 and there's no emacs22 in ubuntu 12.04 repository so I'm a little desperate]

---

OK so it was suggested that I tried

$ CPPFLAGS="-P" ./configure

and this sorts out all of the problems with the carriage return/tabs in lib-src. But actually it just gets to me to the point where I had managed to get manually:

cd src; make all  \
          CC='gcc' CFLAGS='-g -O2 -Wno-pointer-sign ' CPPFLAGS='-D_BSD_SOURCE  -P' \
          LDFLAGS='-Wl,-znocombreloc' MAKE='make'
make[1]: Entering directory `/home/buzzard/local/emacs-22.3/src'
gcc -c -D_BSD_SOURCE  -P -Demacs -DHAVE_CONFIG_H   -I. -I/home/buzzard/local/emacs-22.3/src -D_BSD_SOURCE  -g -O2 -Wno-pointer-sign  pre-crt0.c
make[1]: *** No rule to make target `/usr/lib/crt1.o', needed by `temacs'. Stop.
make[1]: Leaving directory `/home/buzzard/local/emacs-22.3/src'
make: *** [src] Error 2

Umm...I would post other bits and bobs if I knew what I was doing, but to be honest I've never understood make. I've always just hoped it would work...

Answer 1

It's a problem with newer gcc versions. See this change in the Emacs repo which fixed this:

http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=commit;h=16abbbf

You should be able to workaraound the problem by using

CPPFLAGS="-P" ./configure

To circumvent the problem with /usr/lib/crt1.o not being found, you'll have to edit src/Makefile (you might first have to do chmod a+rw src/Makefile for editing it). On newer systems, crt1.o is not in /usr/lib but in /usr/lib/<arch directory>/ , so for example it might be in /usr/lib/i386-linux-gnu (yours might be different!). Then in src/Makefile , change the lines

STARTFILES = pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o

to

STARTFILES = pre-crt0.o /usr/lib/i386-linux-gnu/crt1.o /usr/lib/i386-linux-gnu/crti.o

and

LIBES = ... all kinds of stuff ...  /usr/lib/crtn.o $(GNULIB_VAR)

to

LIBES = ... all kinds of stuff ... /usr/lib/i386-linux-gnu/crtn.o $(GNULIB_VAR)

Again, your directory might be different!