| #! /bin/sh |
| # Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| # This file is part of the GNU C Library. |
| # |
| # The GNU C Library is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2.1 of the License, or (at your option) any later version. |
| # |
| # The GNU C Library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| # |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with the GNU C Library; if not, see |
| # <http://www.gnu.org/licenses/>. |
| |
| # Check installed headers for cleanliness. For each header, confirm |
| # that it's possible to compile a file that includes that header and |
| # does nothing else, in several different compilation modes. Also, |
| # scan the header for a set of obsolete typedefs that should no longer |
| # appear. |
| |
| # These compilation switches assume GCC or compatible, which is probably |
| # fine since we also assume that when _building_ glibc. |
| c_modes="-std=c89 -std=gnu89 -std=c11 -std=gnu11" |
| cxx_modes="-std=c++98 -std=gnu++98 -std=c++11 -std=gnu++11" |
| |
| # An exhaustive test of feature selection macros would take far too long. |
| # These are probably the most commonly used three. |
| lib_modes="-D_DEFAULT_SOURCE=1 -D_GNU_SOURCE=1 -D_XOPEN_SOURCE=700" |
| |
| # sys/types.h+bits/types.h have to define the obsolete types. |
| # rpc(svc)/* have the obsolete types too deeply embedded in their API |
| # to remove. |
| skip_obsolete_type_check='*/sys/types.h|*/bits/types.h|*/rpc/*|*/rpcsvc/*' |
| obsolete_type_re=\ |
| '\<((__)?(quad_t|u(short|int|long|_(char|short|int([0-9]+_t)?|long|quad_t))))\>' |
| |
| if [ $# -lt 3 ]; then |
| echo "usage: $0 c|c++ \"compile command\" header header header..." >&2 |
| exit 2 |
| fi |
| case "$1" in |
| (c) |
| lang_modes="$c_modes" |
| # GOOGLE ONLY: Through an unfortunate combination of circumstances, |
| # the mktemp used here may be as old as 6.12 from 2008, which does |
| # not like having an underscore instead of a dot. |
| cih_test_c=$(mktemp ${TMPDIR-/tmp}/cih_test.XXXXXX) |
| already="$skip_obsolete_type_check" |
| ;; |
| (c++) |
| lang_modes="$cxx_modes" |
| cih_test_c=$(mktemp ${TMPDIR-/tmp}/cih_test.XXXXXX.cc) |
| # The obsolete-type check can be skipped for C++; it is |
| # sufficient to do it for C. |
| already="*" |
| ;; |
| (*) |
| echo "usage: $0 c|c++ \"compile command\" header header header..." >&2 |
| exit 2;; |
| esac |
| shift |
| cc_cmd="$1" |
| shift |
| trap "rm -f '$cih_test_c'" 0 |
| |
| failed=0 |
| is_x86_64=unknown |
| is_x32=unknown |
| for header in "$@"; do |
| # Skip various headers for which this test gets a false failure. |
| case "$header" in |
| # bits/* are not meant to be included directly and usually #error |
| # out if you try it. |
| # regexp.h is a stub containing only an #error. |
| # Sun RPC's .x files are traditionally installed in |
| # $prefix/include/rpcsvc, but they are not C header files. |
| (bits/* | regexp.h | rpcsvc/*.x) |
| continue;; |
| |
| # All extant versions of sys/elf.h contain nothing more than an |
| # exhortation (either a #warning or an #error) to use sys/procfs.h |
| # instead, plus an inclusion of that header. |
| (sys/elf.h) |
| continue;; |
| |
| # libio.h and _G_config.h are deprecation stubs containing #warnings |
| # to use stdio.h instead. |
| (libio.h | _G_config.h) |
| continue;; |
| |
| # sys/sysctl.h is unsupported for x32. |
| (sys/sysctl.h) |
| case "$is_x32" in |
| (yes) continue;; |
| (no) ;; |
| (unknown) |
| cat >"$cih_test_c" <<EOF |
| #if defined __x86_64__ && defined __ILP32__ |
| # error "is x32" |
| #endif |
| EOF |
| if $cc_cmd -xc -fsyntax-only "$cih_test_c" > /dev/null 2>&1 |
| then |
| is_x32=no |
| else |
| is_x32=yes |
| continue |
| fi |
| ;; |
| esac |
| ;; |
| |
| # sys/vm86.h is "unsupported on x86-64" and errors out on that target. |
| (sys/vm86.h) |
| case "$is_x86_64" in |
| (yes) continue;; |
| (no) ;; |
| (unknown) |
| cat >"$cih_test_c" <<EOF |
| #if defined __x86_64__ && __x86_64__ |
| #error "is x86-64" |
| #endif |
| EOF |
| if $cc_cmd -xc -fsyntax-only "$cih_test_c" > /dev/null 2>&1 |
| then |
| is_x86_64=no |
| else |
| is_x86_64=yes |
| continue |
| fi |
| ;; |
| esac |
| esac |
| |
| echo :: "$header" |
| for lang_mode in "" $lang_modes; do |
| for lib_mode in "" $lib_modes; do |
| echo :::: $lang_mode $lib_mode |
| if [ -z "$lib_mode" ]; then |
| expanded_lib_mode='/* default library mode */' |
| else |
| expanded_lib_mode=$(echo : $lib_mode | \ |
| sed 's/^: -D/#define /; s/=/ /') |
| fi |
| cat >"$cih_test_c" <<EOF |
| /* These macros may have been defined on the command line. They are |
| inappropriate for this test. */ |
| #undef _LIBC |
| #undef _GNU_SOURCE |
| /* The library mode is selected here rather than on the command line to |
| ensure that this selection wins. */ |
| $expanded_lib_mode |
| #include <$header> |
| int avoid_empty_translation_unit; |
| EOF |
| if $cc_cmd -xc -fsyntax-only $lang_mode "$cih_test_c" 2>&1 |
| then |
| includes=$($cc_cmd -xc -fsyntax-only -H $lang_mode \ |
| "$cih_test_c" 2>&1 | sed -ne 's/^[.][.]* //p') |
| for h in $includes; do |
| # Don't repeat work. |
| eval 'case "$h" in ('"$already"') continue;; esac' |
| |
| if grep -qE "$obsolete_type_re" "$h"; then |
| echo "*** Obsolete types detected:" |
| grep -HE "$obsolete_type_re" "$h" |
| failed=1 |
| fi |
| already="$already|$h" |
| done |
| else |
| failed=1 |
| fi |
| done |
| done |
| done |
| exit $failed |
