From 2908e4c60a4857c99c9803ca1fd8e6bb18fcb7a5 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 30 Oct 2018 13:22:12 +0100 Subject: lib: Make libunwind optional again Apparently it's really not great to require it for a bunch of platforms. Requested by Sean and Eric. v2: Use combo option (Petri). v3: Fix the right option (Petri) v4: try a bit harder ... v5: Even more simplification (Dylan) Cc: Dylan Baker Cc: Petri Latvala Reviewed-by: Eric Anholt (v1) Reviewed-by: Petri Latvala Cc: Sean Paul Cc: Eric Anholt Signed-off-by: Daniel Vetter --- lib/meson.build | 7 ++++++- lib/stubs/libunwind/libunwind.h | 46 +++++++++++++++++++++++++++++++++++++++++ meson.build | 13 +++++++++++- meson_options.txt | 6 ++++++ 4 files changed, 70 insertions(+), 2 deletions(-) create mode 100644 lib/stubs/libunwind/libunwind.h diff --git a/lib/meson.build b/lib/meson.build index 7e2c9b7a..8961ca49 100644 --- a/lib/meson.build +++ b/lib/meson.build @@ -59,7 +59,6 @@ lib_deps = [ libkmod, libprocps, libudev, - libunwind, libdw, pciaccess, pthreads, @@ -76,6 +75,12 @@ else inc = [ inc, include_directories('stubs/drm') ] endif +if libunwind.found() + lib_deps += libunwind +else + inc = [ inc, include_directories('stubs/libunwind') ] +endif + if valgrind.found() lib_deps += valgrind endif diff --git a/lib/stubs/libunwind/libunwind.h b/lib/stubs/libunwind/libunwind.h new file mode 100644 index 00000000..ce5f30df --- /dev/null +++ b/lib/stubs/libunwind/libunwind.h @@ -0,0 +1,46 @@ +/* + * Copyright © 2018 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Daniel Vetter + */ + +/* dummy libunwind header with stubs, only the minimal amount we need to get by */ + + +typedef int unw_cursor_t; +typedef int unw_context_t; +typedef int unw_word_t; + +#define UNW_REG_IP 0 + +static inline void unw_getcontext(unw_context_t *uc) {} +static inline void unw_init_local(unw_cursor_t *cursor, unw_context_t *uc) {} +static inline int unw_step(unw_cursor_t *cursor) { return 0; } +static inline int unw_get_reg (unw_cursor_t *cursor, int i, unw_word_t * word) +{ + return 0; +} +static inline int unw_get_proc_name (unw_cursor_t *cursor, char *c, size_t s, unw_word_t *word) +{ + return 0; +} diff --git a/meson.build b/meson.build index eff35585..d1e35757 100644 --- a/meson.build +++ b/meson.build @@ -50,6 +50,7 @@ build_chamelium = get_option('build_chamelium') build_docs = get_option('build_docs') build_tests = get_option('build_tests') with_libdrm = get_option('with_libdrm') +with_libunwind = get_option('with_libunwind') build_runner = get_option('build_runner') _build_overlay = build_overlay != 'false' @@ -102,7 +103,17 @@ build_info += 'With libdrm: ' + ','.join(libdrm_info) pciaccess = dependency('pciaccess', version : '>=0.10') libkmod = dependency('libkmod') libprocps = dependency('libprocps', required : true) -libunwind = dependency('libunwind', required : true) + +libunwind = null_dep +libunwindinfo = 'No' +if with_libunwind != 'false' + libunwind = dependency('libunwind', required : with_libunwind == 'true') + if libunwind.found() + libunwindinfo = 'Yes' + endif +endif +build_info += 'With libunwind: ' + libunwindinfo + libdw = dependency('libdw', required : true) ssl = dependency('openssl', required : true) pixman = dependency('pixman-1', required : true) diff --git a/meson_options.txt b/meson_options.txt index 89a3731c..0cd3b350 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -52,6 +52,12 @@ option('with_libdrm', choices : ['', 'auto', 'intel', 'nouveau', 'amdgpu'], description : 'libdrm libraries to be used') +option('with_libunwind', + type : 'combo', + value : 'auto', + choices : ['auto', 'true', 'false'], + description : 'Use libunwind') + option('build_runner', type : 'combo', value : 'auto', -- cgit v1.2.3