Hello, The ‘getaddrinfo’ module doesn’t seem to work as advertised ;-) when cross-building for MinGW.
>From <http://hydra.nixos.org/build/1140382>, a file that includes Gnulib’s <netdb.h> fails to build like this: --8<---------------cut here---------------start------------->8--- /bin/sh ../libtool --tag=CC --mode=compile i686-pc-mingw32-gcc -DHAVE_CONFIG_H -DBUILDING_LIBGUILE=1 -I../../guile-2.0.1.154-f3977 -I.. -I../../guile-2.0.1.154-f3977/lib -I../lib -I/nix/store/hwd5i31rikwdjmjhxn4d2xwlsxczsg0s-libffi-3.0.9-i686-pc-mingw32/lib/libffi-3.0.9/include -I/nix/store/lqyvgsv21wmf15xnznwv5qi78p59zkfm-libunistring-0.9.3-i686-pc-mingw32/include -Wall -Wmissing-prototypes -Wdeclaration-after-statement -Wswitch-enum -fvisibility=hidden -I/nix/store/lli7w1b3kc5nwdwgq9c9ikhdx141bba4-boehm-gc-7.2pre20110122-i686-pc-mingw32/include -g -O2 -c -o net_db.lo ../../guile-2.0.1.154-f3977/libguile/net_db.c libtool: compile: i686-pc-mingw32-gcc -DHAVE_CONFIG_H -DBUILDING_LIBGUILE=1 -I../../guile-2.0.1.154-f3977 -I.. -I../../guile-2.0.1.154-f3977/lib -I../lib -I/nix/store/hwd5i31rikwdjmjhxn4d2xwlsxczsg0s-libffi-3.0.9-i686-pc-mingw32/lib/libffi-3.0.9/include -I/nix/store/lqyvgsv21wmf15xnznwv5qi78p59zkfm-libunistring-0.9.3-i686-pc-mingw32/include -Wall -Wmissing-prototypes -Wdeclaration-after-statement -Wswitch-enum -fvisibility=hidden -I/nix/store/lli7w1b3kc5nwdwgq9c9ikhdx141bba4-boehm-gc-7.2pre20110122-i686-pc-mingw32/include -g -O2 -c ../../guile-2.0.1.154-f3977/libguile/net_db.c -o net_db.o ../../guile-2.0.1.154-f3977/libguile/net_db.c:460:1: error: 'AI_ALL' undeclared here (not in a function) ../../guile-2.0.1.154-f3977/libguile/net_db.c:460:1: error: bit-field '_gl_verify_error_if_negative' width not an integer constant ../../guile-2.0.1.154-f3977/libguile/net_db.c:482:33: warning: 'struct addrinfo' declared inside parameter list ../../guile-2.0.1.154-f3977/libguile/net_db.c:482:33: warning: its scope is only this definition or declaration, which is probably not what you want ../../guile-2.0.1.154-f3977/libguile/net_db.c: In function 'scm_from_addrinfo': ../../guile-2.0.1.154-f3977/libguile/net_db.c:490:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:491:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:492:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:493:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:494:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:494:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:496:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:496:3: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c: In function 'scm_getaddrinfo': ../../guile-2.0.1.154-f3977/libguile/net_db.c:614:19: error: storage size of 'c_hints' isn't known ../../guile-2.0.1.154-f3977/libguile/net_db.c:657:3: warning: implicit declaration of function 'getaddrinfo' ../../guile-2.0.1.154-f3977/libguile/net_db.c:665:10: error: dereferencing pointer to incomplete type ../../guile-2.0.1.154-f3977/libguile/net_db.c:665:19: warning: left-hand operand of comma expression has no effect ../../guile-2.0.1.154-f3977/libguile/net_db.c:666:2: warning: passing argument 1 of 'scm_from_addrinfo' from incompatible pointer type ../../guile-2.0.1.154-f3977/libguile/net_db.c:482:1: note: expected 'const struct addrinfo *' but argument is of type 'struct addrinfo *' ../../guile-2.0.1.154-f3977/libguile/net_db.c:668:7: warning: implicit declaration of function 'freeaddrinfo' ../../guile-2.0.1.154-f3977/libguile/net_db.c:614:19: warning: unused variable 'c_hints' ../../guile-2.0.1.154-f3977/libguile/net_db.c: At top level: ../../guile-2.0.1.154-f3977/libguile/net_db.c:680:1: error: 'EAI_BADFLAGS' undeclared here (not in a function) ../../guile-2.0.1.154-f3977/libguile/net_db.c:680:1: error: bit-field '_gl_verify_error_if_negative' width not an integer constant ../../guile-2.0.1.154-f3977/libguile/net_db.c: In function 'scm_gai_strerror': ../../guile-2.0.1.154-f3977/libguile/net_db.c:744:3: warning: implicit declaration of function 'gai_strerror' ../../guile-2.0.1.154-f3977/libguile/net_db.c:744:3: warning: passing argument 1 of 'scm_from_locale_string' makes pointer from integer without a cast ../../guile-2.0.1.154-f3977/libguile/strings.h:134:13: note: expected 'const char *' but argument is of type 'int' --8<---------------cut here---------------end--------------->8--- Clearly the AI_ constants and ‘struct addrinfo’ aren’t defined by <netdb.h>. The relevant part of the ‘configure’ output is [0]: --8<---------------cut here---------------start------------->8--- checking whether getaddrinfo is declared without a macro... no checking whether freeaddrinfo is declared without a macro... no checking whether gai_strerror is declared without a macro... no checking whether getnameinfo is declared without a macro... no [...] configure: checking how to do getaddrinfo, freeaddrinfo and getnameinfo checking for library containing getaddrinfo... no checking for getaddrinfo... no checking for getaddrinfo in ws2tcpip.h and -lws2_32... no checking whether gai_strerror is declared... yes checking whether gai_strerrorA is declared... yes checking for gai_strerror with POSIX signature... no checking for struct sockaddr.sa_len... no checking whether getaddrinfo is declared... no checking whether freeaddrinfo is declared... no checking whether getnameinfo is declared... no checking for struct addrinfo... yes --8<---------------cut here---------------end--------------->8--- ‘struct addrinfo’ is found in <ws2tcpip.h>, so netdb.h should include it when its available, I guess. As for the AI_ and EAI_ constants, I don’t understand why they’re not being defined [1]. Ideas? Thanks, Ludo’. [0] http://hydra.nixos.org/build/1140382/log/raw [1] See the generated files at: http://hydra.nixos.org/build/1140382/download/1/nix-build-lcd1hjcnfv28rmiwn829wiwhaxdyybc3-guile-2.0.1.154-f3977-i686-pc-mingw32.drv-0/build/config.log http://hydra.nixos.org/build/1140382/download/1/nix-build-lcd1hjcnfv28rmiwn829wiwhaxdyybc3-guile-2.0.1.154-f3977-i686-pc-mingw32.drv-0/build/lib/netdb.h
