[MacPorts] #45832: defect: policykit 0.112_1 cannot be built on PPC Tiger and Leopard because it needs Clang 3.4 which cannot be built

[MacPorts]

#45832: defect: policykit 0.112_1 cannot be built on PPC Tiger and Leopard because
it needs Clang 3.4 which cannot be built
------------------------------+----------------------
  Reporter:  Peter_Dyballa@…  |      Owner:  devans@…
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.3.2
Resolution:                   |   Keywords:
      Port:  policykit        |
------------------------------+----------------------

Comment (by Peter_Dyballa@…):

 Replying to [comment:2 braumann@…]:

 >
 > For {{{mozjs17}}} I have tried both of them but always get this
 "architecture was not detected as supported" error (also see my build
 log):
 >
 > {{{
 > ...
 > :info:build
 /Volumes/Data/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_mozjs17/mozjs17/work/mozjs17.0.0/mfbt
 /double-conversion/utils.h:71:2: error: #error Target architecture was not
 detected as supported by Double-Conversion.
 > ...
 > }}}
 >
 > Looking into {{{utils.h}}} one can see that the architecture check
 obviously has failed, i.e. {{{__powerpc__}}} has not been defined. So my
 first guess is that this symbols needs to be defined before in order to
 let {{{gcc-4.2}}} do the compilation of {{{mozjs17}}}. Hope this can be
 achieved via an official portfile modification, since I am sure it is not
 difficult to work around this issue.

 Could be {{{utils.h}}} is a bit incorrect…

 Apple's GCC 4.2 defines

 {{{
 #define __ppc__ 1
 #define __POWERPC__ 1
 }}}

 The file could be patched. I did try that last night but change Portfile a
 bit:

 {{{
  37 autoconf.cmd        autoconf213
  38 #compiler.blacklist  *gcc-*
  39 configure.args      --with-system-nspr \
  40                     --enable-system-ffi \
  41                     --disable-readline \
  42                     --enable-threadsafe \
  43                     --enable-macos-target=10.5 \
  44                     --with-arch=G4
  45
  46 configure.ccache    no
 }}}

 but had no success. The configure option {{{--with-arch=…}}} leads to
 setting a compiler switch {{{-march=…}}} which GCC 4.2 does not accept.
 Changing configure to output {{{-mcpu=…}}} was successful. I finally left
 port out but used its environment to run this command from {{{
 /opt/local/var/macports/build/_opt_local_var_macports_sources_nue.de.rsync.macports.org_macports_release_tarballs_ports_lang_mozjs17/mozjs17/work/mozjs17.0.0/js/src}}}:

 {{{
 env PATH=/opt/local/bin:$PATH CC='/usr/bin/gcc-4.2' CC_PRINT_OPTIONS='YES'
 CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_nue.de.rsync.macports.org_macports_release_tarballs_ports_lang_mozjs17/mozjs17/work/.CC_PRINT_OPTIONS'
 CFLAGS='-pipe -Os -arch ppc' CPATH='/opt/local/include'
 CPPFLAGS='-I/opt/local/include -D__powerpc__' CXX='/usr/bin/g++-4.2'
 CXXFLAGS='-pipe -Os -arch ppc' F77FLAGS='-m32' F90FLAGS='-pipe -Os -m32'
 FCFLAGS='-pipe -Os -m32' FFLAGS='-pipe -Os' INSTALL='/usr/bin/install -c'
 LDFLAGS='-L/opt/local/lib -Wl,-headerpad_max_install_names -arch ppc'
 LIBRARY_PATH='/opt/local/lib' MACOSX_DEPLOYMENT_TARGET='10.5'
 OBJC='/usr/bin/gcc-4.2' OBJCFLAGS='-pipe -Os -arch ppc'
 OBJCXX='/usr/bin/g++-4.2' OBJCXXFLAGS='-pipe -Os -arch ppc' ./configure
 --prefix=/opt/local --with-system-nspr --enable-system-ffi --disable-
 readline --enable-threadsafe --enable-macos-target=10.5 --with-arch=G4
 }}}

 Notice the {{{CPPFLAGS='-I/opt/local/include -D__powerpc__'}}}! This lead
 a successful compilation of mozjs17, I also could invoke {{{make check}}}.
 I could not wait until this step finished because the bed was calling for
 me…

 So I think that it is possible to compile mozjs17 for PPC Mac OS X
 10.5.8/Leopard.

 P.S.: With GCC it's possible to get the {{{#define}}}s with {{{cpp -dD <
 /dev/null}}} for example. This does not seem to work with Clang, it seems
 to need an empty C file, but then it emits:

 {{{
 #define __ppc__ 1
 #define _ARCH_PPC 1
 #define __powerpc__ 1
 #define __POWERPC__ 1
 #define __ppc__ 1
 }}}

 {{{llvm-gcc}}} gives

 {{{
 #define _ARCH_PPC 1
 #define _ARCH_PPCGR 1
 #define __ppc__ 1
 #define __POWERPC__ 1
 }}}

 so it's as unusable as {{{GCC}}}. Tonight I'm going to test with port's
 Clang {{{mp-clang-3.3}}}.

-- 
Ticket URL: <https://trac.macports.org/ticket/45832#comment:4>
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