Singular build with SAGE_DEBUG misses omalloc headers

[vbraun]

Building singular with SAGE_DEBUG fails to install omalloc headers into local/include/omalloc/, which later causes pynac to fail

[...]
cc1plus: warning: unrecognized command line option '-Wno-parentheses-equality'
mv -f .deps/libpynac_la-inifcns_comb.Tpo .deps/libpynac_la-inifcns_comb.Plo
/usr/bin/bash ../libtool  --tag=CXX   --mode=compile g++ -std=c++11 -DHAVE_CONFIG_H -I. -I..  -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/python2.7 -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/ -DOM_NDEBUG  -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wno-unused-parameter -Wno-unknown-pragmas -Wno-parentheses-equality   -O2 -g  -MT libpynac_la-mpoly-singular.lo -MD -MP -MF .deps/libpynac_la-mpoly-singular.Tpo -c -o libpynac_la-mpoly-singular.lo `test -f 'mpoly-singular.cpp' || echo './'`mpoly-singular.cpp
mv -f .deps/libpynac_la-inifcns_orthopoly.Tpo .deps/libpynac_la-inifcns_orthopoly.Plo
/usr/bin/bash ../libtool  --tag=CXX   --mode=compile g++ -std=c++11 -DHAVE_CONFIG_H -I. -I..  -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/python2.7 -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/ -DOM_NDEBUG  -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wno-unused-parameter -Wno-unknown-pragmas -Wno-parentheses-equality   -O2 -g  -MT libpynac_la-mpoly.lo -MD -MP -MF .deps/libpynac_la-mpoly.Tpo -c -o libpynac_la-mpoly.lo `test -f 'mpoly.cpp' || echo './'`mpoly.cpp
libtool: compile:  g++ -std=c++11 -DHAVE_CONFIG_H -I. -I.. -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/python2.7 -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/ -DOM_NDEBUG -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wno-unused-parameter -Wno-unknown-pragmas -Wno-parentheses-equality -O2 -g -MT libpynac_la-mpoly-singular.lo -MD -MP -MF .deps/libpynac_la-mpoly-singular.Tpo -c mpoly-singular.cpp  -fPIC -DPIC -o .libs/libpynac_la-mpoly-singular.o
libtool: compile:  g++ -std=c++11 -DHAVE_CONFIG_H -I. -I.. -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/python2.7 -I/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/ -DOM_NDEBUG -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wno-unused-parameter -Wno-unknown-pragmas -Wno-parentheses-equality -O2 -g -MT libpynac_la-mpoly.lo -MD -MP -MF .deps/libpynac_la-mpoly.Tpo -c mpoly.cpp  -fPIC -DPIC -o .libs/libpynac_la-mpoly.o
In file included from /mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/factory/factory.h:29,
                 from mpoly-singular.cpp:27:
/mnt/disk/home/buildslave-sage/slave/sage_git/build/local/include/omalloc/omalloc.h:14:10: fatal error: omalloc/omConfig.h: No such file or directory
 #include "omalloc/omConfig.h"
          ^~~~~~~~~~~~~~~~~~~~
compilation terminated.

Indeed:

[buildslave-sage@volker build]$ ll local/include/omalloc/
total 12
-rw-r--r--. 1 buildslave-sage buildslave-sage 10010 Aug  7 00:50 omalloc.h

Depends on #24735

CC: @jpflori @sagetrac-jakobkroeker

Component: build

Issue created by migration from https://trac.sagemath.org/ticket/26023

[jdemeyer]

comment:2

This whole omalloc business is really confusing to me...

See also Singular/Singular#534

[jpflori]

comment:3

IIRC Singular used to install stub headers when omalloc was disabled but that was a long time ago...

[jdemeyer]

comment:4

Maybe we should just stop trying to build Singular without omalloc?

[jpflori]

comment:5

Is there still an xalloc directory used when omalloc is not?
The omConfig part is reminiscent of #17254 comment:381

[jdemeyer]

comment:6

Replying to @jpflori:

Is there still an xalloc directory used when omalloc is not?

Sorry, I don't understand your question.

[jdemeyer]

comment:7

In any case, if Singular wanted to make building with xalloc officially supported, they would have made a configure option for it. I don't think that we should be manually copying directories or whatever.

[jdemeyer]

comment:9

See also Singular/Singular#795

[jdemeyer]

Dependencies: #24735

[jdemeyer]

comment:11

By the way, simply using --disable-omalloc also doesn't work: Singular/Singular#534 (comment)