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meson: Add autodetection to the iconv combo option

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Instead of requiring the user to specify which option to use, which
they will not really know, nor should they need to know.

Search for each type of iconv (in the C library, as a separate
native library, as the GNU implementation) by default.

Fixes https://gitlab.gnome.org/GNOME/glib/issues/1557
This commit is contained in:
Nirbheek Chauhan 2019-03-29 18:01:47 +05:30
parent eefe435828
commit 2f066aeb51
2 changed files with 25 additions and 26 deletions
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45
meson.build
View File

@ -1693,39 +1693,38 @@ glibconfig_conf.set10('G_HAVE_GROWING_STACK', growing_stack)
# USE_LIBICONV_GNU: Using GNU libiconv
# USE_LIBICONV_NATIVE: Using a native impl of iconv in a separate library
#
# We should never use the MinGW C library's iconv. On Windows we use the
# GNU implementation that ships with MinGW.
# On Windows, just always use the built-in implementation
# We should never use the MinGW C library's iconv because it may not be
# available in the actual runtime environment. On Windows, we always use
# the built-in implementation
iconv_opt = get_option('iconv')
if host_system == 'windows'
libiconv = []
# We have a #include "win_iconv.c" in gconvert.c on Windows, so we don't need
# any external library for it
glib_conf.set('USE_LIBICONV_NATIVE', true)
if iconv_opt != 'auto'
warning('-Diconv was set to @0@, which was ignored')
endif
else
found_iconv = false
iconv_opt = get_option('iconv')
if iconv_opt == 'libc'
if cc.has_function('iconv_open')
libiconv = []
found_iconv = true
endif
elif iconv_opt == 'gnu'
if cc.has_header_symbol('iconv.h', 'libiconv_open')
glib_conf.set('USE_LIBICONV_GNU', true)
libiconv = [cc.find_library('iconv')]
found_iconv = true
endif
elif iconv_opt == 'native'
if cc.has_header_symbol('iconv.h', 'iconv_open')
glib_conf.set('USE_LIBICONV_NATIVE', true)
libiconv = [cc.find_library('iconv')]
found_iconv = true
endif
if ['auto', 'libc'].contains(iconv_opt) and cc.has_function('iconv_open')
libiconv = []
found_iconv = true
endif
if not found_iconv and ['auto', 'native'].contains(iconv_opt) and cc.has_header_symbol('iconv.h', 'iconv_open')
glib_conf.set('USE_LIBICONV_NATIVE', true)
libiconv = [cc.find_library('iconv')]
found_iconv = true
endif
if not found_iconv and ['auto', 'gnu'].contains(iconv_opt) and cc.has_header_symbol('iconv.h', 'libiconv_open')
glib_conf.set('USE_LIBICONV_GNU', true)
libiconv = [cc.find_library('iconv')]
found_iconv = true
endif
if not found_iconv
error('iconv implementation "@0@" not found'.format(iconv_opt))
endif
endif
if get_option('internal_pcre')

6
meson_options.txt
View File

@ -5,9 +5,9 @@ option('runtime_libdir',
option('iconv',
type : 'combo',
choices : ['libc', 'gnu', 'native'],
value : 'libc',
description : 'iconv implementation to use (\'libc\' = \'Part of the C stdlib\'; \'gnu\' = \'GNU\'s iconv\'; \'native\' = \'A separate iconv\')')
choices : ['auto', 'libc', 'native', 'gnu'],
value : 'auto',
description : 'iconv implementation to use (\'libc\' = \'Part of the C stdlib\'; \'gnu\' = \'GNU\'s iconv\'; \'native\' = \'A separate iconv\'; \'auto\' = \'Auto-detect which iconv is available\')')
option('charsetalias_dir',
type : 'string',