Added autotools to build process

[jhol]

This patch replaces the previous Makefile-based build system with one based on autotools.

• Many features of this implementation were borrowed from those of the sigrok modules.
• Tests and the valgrind test can be enabled and disabled in the configuration script, with the --disable-tests and --enable-developer-mode flags respectively. Disabling one or other of these minimizes the number of dependencies.
• run-test.sh scripts are replaced by run-test.sh.in templates, which are populated by configure. This change has the benefit that tool pats become hard-coded into the script at configure-time, rather than having to be passed in at build time, which makes the scripts much more convenient to run manually.
• Support for the American Fuzzy Lop fuzz tester has been removed from the Makefile, because the whole application needs to be recompiled with CC=afl-g++, and testing arachne-pnr is the fully integrated state is far too slow to be useful. The pcf and blif parsers should be fuzz tested with a lightweight test harness.
• Support for the Windows MXE build has been removed from the Makefile, because cross-building is beyond the scope of an automake Makefile, and should be fed in through the ./configure script. The correct way to implement this would be through a windows cross-build script similar to sigrok's sigrok-cross-mingw.
• version.cc has been replaced by #defines in config.h which are generated at configure time, rather than make time.
• Out-of-tree builds are now supported.

[cseed]

@jhol Awesome, thanks for the patch! I should have time to look it over this weekend.

[jhol]

@cseed yeah it looks like some travis fixes need folding in, and maybe some replacement for the removed features. If you do want to wait for replacements for the removed features, I don't mind, but I would like some input on how you would like these to work.

[cseed]

This is great! A few things:

• Update the build instructions in the README.
• During configuration, I'm getting:

../configure: line 3702: AX_CXX_COMPILE_STDCXX_11: command not found

I'm using autoconf 2.69. In spite of this, I can proceed.

• You're missing bin/ on the arachne-pnr dependency in the .bin file generation rules:

diff --git a/Makefile.am b/Makefile.am
index d461e5d..ca7a7f9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -48,12 +48,12 @@ arachne_pnr_data_DATA = \
        share/arachne-pnr/chipdb-1k.bin \
        share/arachne-pnr/chipdb-8k.bin

-share/arachne-pnr/chipdb-1k.bin: arachne-pnr $(ICEBOX_DIR)/chipdb-1k.txt
+share/arachne-pnr/chipdb-1k.bin: bin/arachne-pnr $(ICEBOX_DIR)/chipdb-1k.txt
        @$(MKDIR_P) share/arachne-pnr
        $(AM_V_GEN)./bin/arachne-pnr -q -d 1k -c $(ICEBOX_DIR)/chipdb-1k.txt \
                --write-binary-chipdb share/arachne-pnr/chipdb-1k.bin

-share/arachne-pnr/chipdb-8k.bin: arachne-pnr $(ICEBOX_DIR)/chipdb-8k.txt
+share/arachne-pnr/chipdb-8k.bin: bin/arachne-pnr $(ICEBOX_DIR)/chipdb-8k.txt
        @$(MKDIR_P) -p share/arachne-pnr
        $(AM_V_GEN)./bin/arachne-pnr -q -d 8k -c $(ICEBOX_DIR)/chipdb-8k.txt \
                --write-binary-chipdb share/arachne-pnr/chipdb-8k.bin

• At this point, the build is failing with:

$ make
...
g++ -I/Users/cotton/arachne-pnr/build/../src -std=c++11 -MD -Wall -Wshadow -Wsign-compare -Werror -g -O2   -o bin/test_us tests/test_us.o  
./bin/arachne-pnr -q -d 1k -c /usr/local/share/icebox/chipdb-1k.txt \
        --write-binary-chipdb share/arachne-pnr/chipdb-1k.bin
../autostuff/install-sh: invalid option: -p
make[1]: *** [share/arachne-pnr/chipdb-8k.bin] Error 1
make: *** [all] Error 2

I didn't look deeper.

• To Travis working, you just need to update the script: line in .travis.yml to include the new build steps (autogen, configure, etc.) The Travis docs are here:

https://docs.travis-ci.com/

I'm happy to help with that once I get things working locally if you prefer.

[jhol]

Thanks for the comments - I'll get this fixed up pretty soon.

[jhol]

@cseed I've now fixed all this issues you mentioned.

There's just one issue remaining with the Travis Linux builds. The build is failing because the Ubuntu 12.04 build host is too old to have the AutoConf AC_PACKAGE_VERSION macro, which seems have been released a little later than 2012.

Is there any scope for selecting a more up-to-date build VM? I'm not that familiar with what options Travis gives you.

The alternative is to make the build scripts compatible with Ubuntu 12.04, but that seems rather pointless for such an old distro with a brand-new project.

The Mac build works fine.

[karlp]

Why can't autotools be made to work on a still supported LTS system? isn't autotools all about handling system differences like this?

[jhol]

@karlp Well it certainly could be - at the sacrifice of the availability of the macro AC_PREREQ which is used to ensure the AM_SILENT_RULES macro will be available.

Do you use 12.04 LTS? I thought people mostly stayed on that for production or coorporate deployments.

[jhol]

@cseed did you get a chance to have another look at this yet?

[cliffordwolf]

This is now over a year old, has conflicts with current master, and I think @cseed will not ever look at it, so I'm now closing the issue.

[jhol]

@cliffordwolf is this worth resurrecting? I added autotools to make the code more portable.

[cliffordwolf]

is this worth resurrecting?

I don't think so. I'm not the right person to review such a change (I'm not really a fan of autotools for my own projects tbh), and it doesn't seem like cseed has the time to look into any arachne-pnr related issues.