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meson/test cases/frameworks/22 gir link order/meson.build

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gnome: Distinguish between internal and external linker flags When an older version of the library being built is installed in the same prefix as external dependencies, we have to be careful to construct the linker or compiler command line. If a -L flag from external dependencoes comes before a -L flag pointing to builddir, it is possible for the linker to load older libraries from the installation prefix instead of the newly built ones, which is likely to cause undefined reference error. Since the order of dependencies is not significant, we cannot expect internal dependencies to appear before external dependencies when recursively iterating the list of dependencies. To make it harder to make mistakes, linker flags come from internal and external dependencies are now stored in different order sets. Code using _get_dependencies_flags are expected to follow the order when constructing linker command line: 1. Internal linker flags 2. LDFLAGS set by users 3. External linker flags It is similar to what automake and libtool do for autotools projects.
7 years ago
project('gir link order', 'c')
CI: Skip git tests if g-ir-scanner does not exist
5 years ago
if not dependency('glib-2.0', required : false).found() or not find_program('g-ir-scanner', required: false).found()
gnome: Distinguish between internal and external linker flags When an older version of the library being built is installed in the same prefix as external dependencies, we have to be careful to construct the linker or compiler command line. If a -L flag from external dependencoes comes before a -L flag pointing to builddir, it is possible for the linker to load older libraries from the installation prefix instead of the newly built ones, which is likely to cause undefined reference error. Since the order of dependencies is not significant, we cannot expect internal dependencies to appear before external dependencies when recursively iterating the list of dependencies. To make it harder to make mistakes, linker flags come from internal and external dependencies are now stored in different order sets. Code using _get_dependencies_flags are expected to follow the order when constructing linker command line: 1. Internal linker flags 2. LDFLAGS set by users 3. External linker flags It is similar to what automake and libtool do for autotools projects.
7 years ago
error('MESON_SKIP_TEST glib not found.')
endif
gnome = import('gnome')
glib = dependency('glib-2.0')
gobject = dependency('gobject-2.0')
# get-prgname is a shared library which uses a function from glib-2.0. It is
# used to introduce external -L flags which may cause -L order problems.
subdir('get-prgname')
# fake-gthread is a shared library which has the same name as gthread-2.0 from
# GLib. This is used to simulate the case where an older or unrelated version
# of a library is already installed on the system. Our meson sample library
# defined below uses a function from fake-gthread. If meson messes up -L order,
# the linker will find libgthread-2.0.so installed on the system and fail to
# find the symbol our meson sample library uses.
subdir('fake-gthread')
meson_sample_sources = ['meson-sample.c', 'meson-sample.h']
meson_sample_lib = shared_library(
'sample',
sources : meson_sample_sources,
dependencies : [gobject, get_prgname, fake_gthread],
install : false,
)
gnome.generate_gir(
meson_sample_lib,
sources : meson_sample_sources,
nsversion : '1.0',
namespace : 'Meson',
symbol_prefix : 'meson',
identifier_prefix : 'Meson',
includes : ['GObject-2.0'],
install : false,
build_by_default: true,
)