libctl fails to build with gcc-4.2 (x86_64 and ppc): ctl.h:30:24: error: guile/gh.h: No such file or directory

[barracuda156]

The build quickly fails on:

libtool: compile:  /usr/bin/gcc-4.2 -DHAVE_CONFIG_H -I. -I.. -I/opt/x86_64/include -I/opt/x86_64/include/guile/3.0 -I/opt/x86_64 -pipe -Os -arch x86_64 -MT integrator.lo -MD -MP -MF .deps/integrator.Tpo -c integrator.c -o integrator.o
In file included from ctl-f77-glue.c:25:
ctl.h:30:24: error: guile/gh.h: No such file or directory
In file included from ctl-f77-glue.c:25:
ctl.h:82: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'list'
ctl.h:83: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'function'
ctl.h:84: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'object'
ctl.h:199: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'ctl_gh_bool2scm'
ctl.h:203: error: expected ')' before 'sv'

With gcc12 it builds fine.

[barracuda156]

Xcode Clang of 10.6.8 also fails on the header:

libtool: compile:  /usr/bin/clang -DHAVE_CONFIG_H -I. -I.. -I/opt/x86_64/include -I/opt/x86_64/include/guile/3.0 -I/opt/x86_64 -pipe -Os -arch x86_64 -MT integrator.lo -MD -MP -MF .deps/integrator.Tpo -c integrator.c -o integrator.o
In file included from ctl-f77-glue.c:25:
./ctl.h:30:12: fatal error: 'guile/gh.h' file not found
#  include <guile/gh.h>
           ^
1 error generated.
In file included from ctl.c:27:
./ctl.h:30:12: fatal error: 'guile/gh.h' file not found
#  include <guile/gh.h>
           ^
In file included from subplex.c:62:
./ctl.h:30:12: fatal error: 'guile/gh.h' file not found
#  include <guile/gh.h>
           ^
make[3]: *** [ctl-f77-glue.lo] Error 1

In fact configure has a clause for modern Guile headers, but old compilers fail to account for it:

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for modern non-gh interface" >&5
$as_echo_n "checking for modern non-gh interface... " >&6; }
ok=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

[kencu (Ken)]

This doesn't look like a compiler error:

fatal error: 'guile/gh.h' file not found

It looks like it can't find guile.

This is maybe a compiler error, not sure given the above, have to look see after the above is fixed:

ctl.h:82: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'list'

[kencu (Ken)]

Replying to barracuda156:

In fact configure has a clause for modern Guile headers, but old compilers fail to account for it:

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for modern non-gh interface" >&5
$as_echo_n "checking for modern non-gh interface... " >&6; }
ok=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

with what is posted here, I can't see what the compiler would have to do with this failing here either, but perhaps there is more in the actual config file that might explain it.

[barracuda156]

In 43e76d29a18faba480f55a6d9456c84269a57521/macports-ports (master):

libctl: blacklist old compilers, which fail to build it
Fixes: #66164