Re: Undeclared function 'eventfd error in socketpair

From: Henrik Holst via curl-library <curl-library_at_lists.haxx.se>
Date: Sun, 30 Mar 2025 22:33:09 +0200

however looking at the source file:

#ifdef HAVE_EVENTFD
#ifdef HAVE_SYS_EVENTFD_H
#include <sys/eventfd.h>
#endif

it sounds more like HAVE_EVENTFD is set but HAVE_SYS_EVENTFD_H isn't which
makes events.h not to be included but the call to eventfd to be made
anyway. Probably should search through config.log to try and determine why
the one is set but not both.

/HH

Den sön 30 mars 2025 kl 22:22 skrev Henrik Holst <
henrik.holst_at_millistream.com>:

> considering that all errors are reported from socketpair.c I would first
> try and remove the "--disable-socketpair" flag from configure to see if
> that would help.
>
> /HH
>
> Den sön 30 mars 2025 kl 21:32 skrev Abhinav Singhal via curl-library <
> curl-library_at_lists.haxx.se>:
>
>> Hi,
>>
>> I currently have curl 8.7 installed (built with openssl) and I’m trying
>> to upgrade to 8.12.1. However, I’m running into the following error:
>>
>>
>>
>> ../../../../../distro/lib/socketpair.c:37:13: error: call to undeclared
>> function 'eventfd'; ISO C99 and later do not support implicit function
>> declarations [-Wimplicit-function-declaration]
>>
>> 37 | int efd = eventfd(0, nonblocking ? EFD_CLOEXEC | EFD_NONBLOCK :
>> EFD_CLOEXEC);
>>
>> | ^
>>
>> ../../../../../distro/lib/socketpair.c:37:38: error: use of undeclared
>> identifier 'EFD_CLOEXEC'
>>
>> 37 | int efd = eventfd(0, nonblocking ? EFD_CLOEXEC | EFD_NONBLOCK :
>> EFD_CLOEXEC);
>>
>> | ^
>>
>> ../../../../../distro/lib/socketpair.c:37:52: error: use of undeclared
>> identifier 'EFD_NONBLOCK'
>>
>> 37 | int efd = eventfd(0, nonblocking ? EFD_CLOEXEC | EFD_NONBLOCK :
>> EFD_CLOEXEC);
>>
>> | ^
>>
>> ../../../../../distro/lib/socketpair.c:37:67: error: use of undeclared
>> identifier 'EFD_CLOEXEC'
>>
>> 37 | int efd = eventfd(0, nonblocking ? EFD_CLOEXEC | EFD_NONBLOCK :
>> EFD_CLOEXEC);
>>
>> |
>> ^
>>
>> 4 errors generated.
>>
>> Makefile:3061: recipe for target 'libcurl_la-socketpair.lo' failed
>>
>>
>>
>> --
>>
>>
>>
>> On further investigation, I found that the following change was
>> introduced with curl release 8.11.1, which is most likely the cause of the
>> above failure:
>>
>> socketpair: fix enabling `USE_EVENTFD` [30]
>>
>>
>>
>>
>>
>> The following are the libcurl flags in my configuration:
>>
>> --disable-bearer-auth
>>
>> --disable-dateparse
>>
>> --disable-dict
>>
>> --disable-ech
>>
>> --disable-gopher
>>
>> --disable-headers-api
>>
>> --disable-hsts
>>
>> --disable-imap
>>
>> --disable-mime
>>
>> --disable-mqtt
>>
>> --disable-negotiate-auth
>>
>> --disable-ntlm-wb
>>
>> --disable-pop3
>>
>> --disable-rtsp
>>
>> --disable-sspi
>>
>> --disable-telnet
>>
>> --disable-tls-srp
>>
>> --disable-unix-sockets
>>
>> --disable-websockets
>>
>> --disable-socketpair
>>
>> --enable-ipv6
>>
>> --prefix=/usr
>>
>> --with-openssl
>>
>> --with-random=/dev/urandom
>>
>> --without-brotli
>>
>> --without-f77
>>
>> --without-fish-functions-dir
>>
>> --without-g77
>>
>> --without-hyper
>>
>> --without-libidn2
>>
>> --without-libpsl
>>
>> --without-librtmp
>>
>> --without-libssh2
>>
>> --without-msh3
>>
>> --without-nghttp2
>>
>> --without-nghttp3
>>
>> --without-ngtcp2
>>
>> --without-openssl-quic
>>
>> --without-quiche
>>
>> --without-winidn
>>
>> --without-zlib
>>
>> --without-zsh-functions-dir
>>
>> --without-zstd
>>
>>
>>
>>
>>
>> How may I get past this issue? Should I enable some of the above
>> components in order to get past the compilation errors?
>>
>> Thanks.
>> --
>> Unsubscribe: https://lists.haxx.se/mailman/listinfo/curl-library
>> Etiquette: https://curl.se/mail/etiquette.html
>>
>

-- 
Unsubscribe: https://lists.haxx.se/mailman/listinfo/curl-library
Etiquette:   https://curl.se/mail/etiquette.html

Received on 2025-03-30