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Revision 1.4 - (show annotations) (download)
Tue Feb 26 21:05:39 2013 UTC (13 months, 3 weeks ago) by mgorny
Branch: MAIN
Changes since 1.3: +2 -1 lines
Run header checksumming function only if /usr/include exists (IOW: silence the warning).

1 # Copyright 1999-2013 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/multilib-build.eclass,v 1.3 2013/02/26 14:42:24 mgorny Exp $
4
5 # @ECLASS: multilib-build.eclass
6 # @MAINTAINER:
7 # Michał Górny <mgorny@gentoo.org>
8 # @BLURB: flags and utility functions for building multilib packages
9 # @DESCRIPTION:
10 # The multilib-build.eclass exports USE flags and utility functions
11 # necessary to build packages for multilib in a clean and uniform
12 # manner.
13 #
14 # Please note that dependency specifications for multilib-capable
15 # dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
16 # to properly request multilib enabled.
17
18 if [[ ! ${_MULTILIB_BUILD} ]]; then
19
20 # EAPI=5 is required for meaningful MULTILIB_USEDEP.
21 case ${EAPI:-0} in
22 5) ;;
23 *) die "EAPI=${EAPI} is not supported" ;;
24 esac
25
26 inherit multilib multiprocessing
27
28 # @ECLASS-VARIABLE: _MULTILIB_FLAGS
29 # @INTERNAL
30 # @DESCRIPTION:
31 # The list of multilib flags and corresponding ABI values.
32 _MULTILIB_FLAGS=(
33 abi_x86_32:x86
34 abi_x86_64:amd64
35 )
36
37 # @ECLASS-VARIABLE: MULTILIB_USEDEP
38 # @DESCRIPTION:
39 # The USE-dependency to be used on dependencies (libraries) needing
40 # to support multilib as well.
41 #
42 # Example use:
43 # @CODE
44 # RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
45 # net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
46 # @CODE
47
48 _multilib_build_set_globals() {
49 local flags=( "${_MULTILIB_FLAGS[@]%:*}" )
50 local usedeps=${flags[@]/%/(-)?}
51
52 IUSE=${flags[*]}
53 MULTILIB_USEDEP=${usedeps// /,}
54 }
55 _multilib_build_set_globals
56
57 # @FUNCTION: multilib_get_enabled_abis
58 # @DESCRIPTION:
59 # Return the ordered list of enabled ABIs if multilib builds
60 # are enabled. The best (most preferred) ABI will come last.
61 #
62 # If multilib is disabled, the default ABI will be returned
63 # in order to enforce consistent testing with multilib code.
64 multilib_get_enabled_abis() {
65 debug-print-function ${FUNCNAME} "${@}"
66
67 local abis=( $(get_all_abis) )
68
69 local abi i found
70 for abi in "${abis[@]}"; do
71 for i in "${_MULTILIB_FLAGS[@]}"; do
72 local m_abi=${i#*:}
73 local m_flag=${i%:*}
74
75 if [[ ${m_abi} == ${abi} ]] && use "${m_flag}"; then
76 echo "${abi}"
77 found=1
78 fi
79 done
80 done
81
82 if [[ ! ${found} ]]; then
83 debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${DEFAULT_ABI}"
84 echo ${DEFAULT_ABI}
85 fi
86 }
87
88 # @FUNCTION: multilib_foreach_abi
89 # @USAGE: <argv>...
90 # @DESCRIPTION:
91 # If multilib support is enabled, sets the toolchain up for each
92 # supported ABI along with the ABI variable and correct BUILD_DIR,
93 # and runs the given commands with them.
94 #
95 # If multilib support is disabled, it just runs the commands. No setup
96 # is done.
97 multilib_foreach_abi() {
98 local initial_dir=${BUILD_DIR:-${S}}
99
100 local ABI
101 for ABI in $(multilib_get_enabled_abis); do
102 multilib_toolchain_setup "${ABI}"
103 local BUILD_DIR=${initial_dir%%/}-${ABI}
104 "${@}" | tee -a "${T}/build-${ABI}.log"
105 done
106 }
107
108 # @FUNCTION: multilib_parallel_foreach_abi
109 # @USAGE: <argv>...
110 # @DESCRIPTION:
111 # If multilib support is enabled, sets the toolchain up for each
112 # supported ABI along with the ABI variable and correct BUILD_DIR,
113 # and runs the given commands with them. The commands are run
114 # in parallel with number of jobs being determined from MAKEOPTS.
115 #
116 # If multilib support is disabled, it just runs the commands. No setup
117 # is done.
118 #
119 # Useful for running configure scripts.
120 multilib_parallel_foreach_abi() {
121 local initial_dir=${BUILD_DIR:-${S}}
122
123 multijob_init
124
125 local ABI
126 for ABI in $(multilib_get_enabled_abis); do
127 (
128 multijob_child_init
129
130 multilib_toolchain_setup "${ABI}"
131 local BUILD_DIR=${initial_dir%%/}-${ABI}
132 "${@}" 2>&1 | tee -a "${T}/build-${ABI}.log"
133 ) &
134
135 multijob_post_fork
136 done
137
138 multijob_finish
139 }
140
141 # @FUNCTION: multilib_check_headers
142 # @DESCRIPTION:
143 # Check whether the header files are consistent between ABIs.
144 #
145 # This function needs to be called after each ABI's installation phase.
146 # It obtains the header file checksums and compares them with previous
147 # runs (if any). Dies if header files differ.
148 multilib_check_headers() {
149 _multilib_header_cksum() {
150 [[ -d ${ED}usr/include ]] && \
151 find "${ED}"usr/include -type f \
152 -exec cksum {} + | sort -k2
153 }
154
155 local cksum=$(_multilib_header_cksum)
156 local cksum_file=${T}/.multilib_header_cksum
157
158 if [[ -f ${cksum_file} ]]; then
159 local cksum_prev=$(< "${cksum_file}")
160
161 if [[ ${cksum} != ${cksum_prev} ]]; then
162 echo "${cksum}" > "${cksum_file}.new"
163
164 eerror "Header files have changed between ABIs."
165
166 if type -p diff &>/dev/null; then
167 eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
168 else
169 eerror "Old checksums in: ${cksum_file}"
170 eerror "New checksums in: ${cksum_file}.new"
171 fi
172
173 die "Header checksum mismatch, aborting."
174 fi
175 else
176 echo "${cksum}" > "${cksum_file}"
177 fi
178 }
179
180 _MULTILIB_BUILD=1
181 fi

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