[Octave-bug-tracker] [bug #57049] Mac build failure: CFLocaleCopyCurrent from CoreFoundation not found

[Rik]

Follow-up Comment #5, bug #57049 (project octave):

If this is a general (but new) requirement for Mac systems then a configure
test should be written to determine when it is required and then LDFLAGS
changed.

There is already a macro OCTAVE_HAVE_FRAMEWORK in m4/acinclude.m4 which can be
used to check whether a particular framework (like Carbon) exists.

See this example in configure.ac


### Check for the Carbon framework on macOS systems.

OCTAVE_HAVE_FRAMEWORK([Carbon],
  [[#include <Carbon/Carbon.h>]], [[CGMainDisplayID ()]],
  [have_framework_carbon=yes], [have_framework_carbon=no])
if test $have_framework_carbon = yes; then
  AC_DEFINE(HAVE_FRAMEWORK_CARBON, 1,
    [Define to 1 if framework CARBON is available.])
  CARBON_LIBS="-framework Carbon"
  AC_MSG_NOTICE([adding -framework Carbon to CARBON_LIBS])
  AC_SUBST(CARBON_LIBS)
fi


Maybe something similar should exist for framework CoreFoundation.  The CARBON
libraries themselves are pulled in via this statement in configure.ac


LIBOCTINTERP_LINK_DEPS="$FT2_LIBS $HDF5_LIBS $MAGICK_LIBS $Z_LIBS $FFTW_XLIBS
$OPENGL_LIBS $FONTCONFIG_LIBS $FREETYPE_LIBS $X11_LIBS $CARBON_LIBS
$GL2PS_LIBS $LLVM_LIBS $JAVA_LIBS $LAPACK_LIBS"


There are similar LINK_DEPS for LIBOCTAVE if that is where the dependency
belongs.


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