"CFLAGS for -O switch" configure error about kerl

[garazdawi]

-O2 is default and probably best. -O3 does a lot of fancy things, but normally have very minimal effect. I think that kerl should leave it alone and let the user and Erlang configure decide what to set it to.

[garazdawi]

What does your CFLAGS environment variable say? Can you post the log of the build?

[paulo-ferraz-oliveira]

@garazdawi, is there such a thing as a "default" or "best" O flag? If so, kerl could probably apply it. Otherwise we can always leave it as-is and let Erlang complain as above (?)

[Grimgrams]

here's the build log.
otp_build_25.0.log

[garazdawi]

@Grimgrams your CFLAGS is set to, CFLAGS='-I/usr/local/opt/openssl/include/ -I/usr/local/include -I/usr/local/opt/expat/include'. You need to add a -O in there (just as the error message says).

[Grimgrams]

@Grimgrams your CFLAGS is set to, CFLAGS='-I/usr/local/opt/openssl/include/ -I/usr/local/include -I/usr/local/opt/expat/include'. You need to add a -O in there (just as the error message says).

Thank You! This worked but now I am getting a build error this time

APPLICATIONS DISABLED (See: /Users/grimgram/.kerl/builds/25.0/otp_build_25.0.log)
 * odbc           : ODBC library - link check failed

APPLICATIONS INFORMATION (See: /Users/grimgram/.kerl/builds/25.0/otp_build_25.0.log)
 * wx             : wxWidgets was not compiled with --enable-webview or wxWebView developer package is not installed, wxWebView will NOT be available
 * Can not link wx program are all developer packages installed?

Build failed.
5 warnings and 2 errors generated.
gmake[4]: *** [aarch64-apple-darwin23.0.0/Makefile:909: obj/aarch64-apple-darwin23.0.0/opt/jit/inet_drv.o] Error 1
gmake[4]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/erts/emulator'
gmake[3]: *** [/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/make/run_make.mk:35: opt] Error 2
gmake[3]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/erts/emulator'
gmake[2]: *** [Makefile:45: opt] Error 2
gmake[2]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/erts'
gmake[1]: *** [Makefile:60: jit] Error 2
gmake[1]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/erts'
gmake: *** [Makefile:496: emulator] Error 2

here is the build log for this one.
otp_build_25.0.log

[garazdawi]

You seem to be running MacOS Sonoma? Apple seems to have changed some things that makes Erlang 25.0 not compile anymore. Try compiling Erlang 26.0.2 and see if that works.

[Grimgrams]

Yeah, I thought that might be the problem I wasn't sure though. I got the same build error as before, I'll try to install it on a backup I have of MacOS Ventura.

[Grimgrams]

I went back to macOS Ventura and I am now getting this error.

Configure failed.
checking for getrusage... yes
checking for sys/event.h... yes
checking for sys/epoll.h... no
checking for sys/devpoll.h... no
checking for sys/timerfd.h... no
checking for netpacket/packet.h... no
checking for netinet/sctp.h... no
configure: error: sctp support requested, but cannot be enabled since 'netinet/sctp.h' is missing
ERROR: /Users/grimgram/.kerl/builds/25.0/otp_src_25.0/erts/configure failed!
./configure: line 366: kill: (-86222) - No such process

I already installed libusrsctp with brew.

build log.
otp_build_25.0.log

[garazdawi]

As noted in the gen_sctp manual, for sctp to work you need kernel support for sctp. Erlang cannot use a userspace sctp driver.

I know there are people that have written nifs/linked in drivers around userspace sctp, though I’m unsure if any are released as opensource.

[Grimgrams]

Ok so I disabled the sctp support and now it returns this.

Build failed.
=== Entering application kernel
gmake[3]: Entering directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/lib/kernel/src'
erlc -W  -Werror +slim -Werror -I../include -o/lib/kernel/ebin application.erl
gmake[3]: *** [/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/make/aarch64-apple-darwin22.6.0/otp.mk:129: /lib/kernel/ebin/application.beam] Segmentation fault: 11
gmake[3]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/lib/kernel/src'
gmake[2]: *** [/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/make/otp_subdir.mk:29: opt] Error 2
gmake[2]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/lib/kernel'
gmake[1]: *** [/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/make/otp_subdir.mk:29: opt] Error 2
gmake[1]: Leaving directory '/Users/grimgram/.kerl/builds/25.0/otp_src_25.0/lib'
gmake: *** [Makefile:634: secondary_bootstrap_build] Error 2

otp_build_25.0.log