Please describe exactly how you build Libassuan. Compiler, OS etc, error message.

Detail info in https://trac.macports.org/ticket/51708
OS: PPC Tiger, Mac OS X 10.4.11
The build process is automated by macport.

I have seen that but pretty pelase describe it here so that we can also work
with email.

See T2910.

D380: 963_src_assuan-socket_INADDR_LOOPBACK.patch

This happens on at least PPC Mac OS X 10.4.11, Tiger. Compiler is by default Apple's
version of GCC 4.2. The error is reported as this:

libtool: compile: /opt/local/bin/gcc-apple-4.2 -DHAVE_CONFIG_H -I. -I..
-I.. -I/opt/local/include -I/opt/local/include -pipe -Os -arch ppc -Wall
-Wcast-align -Wshadow -Wstrict-prototypes -Wpointer-arith -MT
libassuan_la-assuan-socket.lo -MD -MP -MF .deps/libassuan_la-assuan-
socket.Tpo -c assuan-socket.c -fno-common -DPIC -o .libs/libassuan_la-
assuan-socket.o
assuan-socket.c: In function 'socks5_connect':
assuan-socket.c:732: error: 'INADDR_LOOPBACK' undeclared (first use in
this function)
assuan-socket.c:732: error: (Each undeclared identifier is reported only
once
assuan-socket.c:732: error: for each function it appears in.)
make[3]: * [libassuan_la-assuan-socket.lo] Error 1
make[3]: Leaving directory
`/opt/local/var/macports/build/_opt_local_var_macports_sources_lil.fr.rsync.macports.or
g_release_tarballs_ports_devel_libassuan/libassuan/work/libassuan-2.4.3/src'
make[2]: * [all] Error 2
make[2]: Leaving directory
`/opt/local/var/macports/build/_opt_local_var_macports_sources_lil.fr.rsync.macports.or
g_release_tarballs_ports_devel_libassuan/libassuan/work/libassuan-2.4.3/src'
make[1]: * [all-recursive] Error 1
make[1]: Leaving directory
`/opt/local/var/macports/build/_opt_local_var_macports_sources_lil.fr.rsync.macports.or
g_release_tarballs_ports_devel_libassuan/libassuan/work/libassuan-2.4.3'
make: * [all] Error 2
make: Leaving directory
`/opt/local/var/macports/build/_opt_local_var_macports_sources_lil.fr.rsync.macports.or
g_release_tarballs_ports_devel_libassuan/libassuan/work/libassuan-2.4.3'
Command failed: cd
"/opt/local/var/macports/build/_opt_local_var_macports_sources_lil.fr.rsync.macports.or
g_release_tarballs_ports_devel_libassuan/libassuan/work/libassuan-2.4.3"
&& /usr/bin/make -w all

Cause is that the declaration of 'INADDR_LOOPBACK' is hidden behind some guards. The
two external links document the situation, they also offer patches, either the attached
one or this addition for src/assuan-socket.c:

//fix missing define in MacOSX 10.4 Tiger
#ifndef INADDR_LOOPBACK

#define INADDR_LOOPBACK (u_int32_t)0x7f000001

#endif

In ten days I'll be at home again with my Apple PowerBook G4 and might have time to
check the situation in Mac OS X 10.5, Leopard.