[MacPorts] #63162: libudns @0.4: configure: fatal: cannot find libraries needed for sockets

[MacPorts]

#63162: libudns @0.4: configure: fatal: cannot find libraries needed for sockets
-----------------------------+---------------------
 Reporter:  cooljeanius      |      Owner:  (none)
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.7.1
 Keywords:  bigsur catalina  |       Port:  libudns
-----------------------------+---------------------
 I'm on Big Sur with Xcode 12.5.1; libudns fails to configure saying this:
 {{{
 --->  Configuring libudns
 DEBUG: Preferred compilers: clang macports-clang-9.0 macports-clang-12
 macports-clang-11 macports-clang-10
 DEBUG: Using compiler 'Xcode Clang'
 DEBUG: Executing org.macports.configure (libudns)
 DEBUG: Environment:
 CC='/usr/bin/clang'
 CC_PRINT_OPTIONS='YES'
 CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libudns/libudns/work/.CC_PRINT_OPTIONS'
 CFLAGS='-pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64'
 CPATH='/opt/local/include'
 CPPFLAGS='-I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk'
 CXX='/usr/bin/clang++'
 CXXFLAGS='-pipe -Os -stdlib=libc++
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64'
 DEVELOPER_DIR='/Library/Developer/CommandLineTools'
 F90FLAGS='-pipe -Os -m64'
 FCFLAGS='-pipe -Os -m64'
 FFLAGS='-pipe -Os -m64'
 INSTALL='/usr/bin/install -c'
 LDFLAGS='-L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk
 -arch x86_64'
 LIBRARY_PATH='/opt/local/lib'
 MACOSX_DEPLOYMENT_TARGET='11.0'
 OBJC='/usr/bin/clang'
 OBJCFLAGS='-pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64'
 OBJCXX='/usr/bin/clang++'
 OBJCXXFLAGS='-pipe -Os -stdlib=libc++
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64'
 SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk'
 Executing:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libudns/libudns/work/udns-0.4"
 && ./configure
 DEBUG: system:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libudns/libudns/work/udns-0.4"
 && ./configure
 configure... udns package
 checking for C compiler... $CC (/usr/bin/clang)
 checking whenever the C compiler (/usr/bin/clang -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk
 -arch x86_64)
            can produce executables... yes
 checking for ranlib... ranlib
 checking for getopt()... yes
 checking for libraries needed for socket and connect... not found
 configure: fatal: cannot find libraries needed for sockets
 Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libudns/libudns/work/udns-0.4"
 && ./configure
 Exit code: 1
 Error: Failed to configure libudns: consult
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libudns/libudns/work/udns-0.4/config.log
 Error: Failed to configure libudns: configure failure: command execution
 failed
 DEBUG: Error code: NONE
 DEBUG: Backtrace: configure failure: command execution failed
 }}}
 Checking `config.log` shows this:
 {{{
 >>> checking for libraries needed for socket and connect
 ==== Command invocation failed. Command line was:
 /usr/bin/clang -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk
 -arch x86_64 conftest.c -o conftest
 ==== compiler input was:
 int main() { socket(); connect(); return 0; }
 ==== output was:
 conftest.c:1:14: error: implicit declaration of function 'socket' is
 invalid in C99 [-Werror,-Wimplicit-function-declaration]
 int main() { socket(); connect(); return 0; }
              ^
 conftest.c:1:24: error: implicit declaration of function 'connect' is
 invalid in C99 [-Werror,-Wimplicit-function-declaration]
 int main() { socket(); connect(); return 0; }
                        ^
 2 errors generated.
 ====
 ==== Command invocation failed. Command line was:
 /usr/bin/clang -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch
 x86_64 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk
 -arch x86_64 conftest.c -o conftest -lsocket -lnsl
 ==== compiler input was:
 int main() { socket(); connect(); return 0; }
 ==== output was:
 conftest.c:1:14: error: implicit declaration of function 'socket' is
 invalid in C99 [-Werror,-Wimplicit-function-declaration]
 int main() { socket(); connect(); return 0; }
              ^
 conftest.c:1:24: error: implicit declaration of function 'connect' is
 invalid in C99 [-Werror,-Wimplicit-function-declaration]
 int main() { socket(); connect(); return 0; }
                        ^
 2 errors generated.
 ====
 === not found
 === FATAL: cannot find libraries needed for sockets
 }}}
 ...so IOW it's another case of `-Werror=implicit-function-declaration`
 being on by default now. Note that libudns's configure script is hand-
 written and doesn't use autoconf, so it should be edited directly.

 (also note that this blocks installation of the jabberd port for me)

-- 
Ticket URL: <https://trac.macports.org/ticket/63162>
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