#! /bin/sh set -u # Test whether this shell is capable of parameter substring processing. ( option='a/b'; : ${option#*/} ) 2>/dev/null || { echo " The shell interpreting '$0' is lacking some required features. To work around this problem you may try to execute: ksh $0 $* or bash $0 $* " exit 1 } # Store original IFS value so it can be changed (and restored) in many places. readonly DEFAULT_IFS="$IFS" # The top-level directory for the source. This ./configure and all Makefiles # are good with ${srcdir} usually being relative. Some components (e.g. tests) # are executed in subdirectories and for those it is simpler to use # ${NOTMUCH_SRCDIR} which holds absolute path to the source. srcdir=$(dirname "$0") NOTMUCH_SRCDIR=$(cd "$srcdir" && pwd) subdirs="util compat lib parse-time-string completion doc emacs" subdirs="${subdirs} performance-test test test/test-databases" subdirs="${subdirs} bindings" # For a non-srcdir configure invocation (such as ../configure), create # the directory structure and copy Makefiles. if [ "$srcdir" != "." ]; then for dir in . ${subdirs}; do mkdir -p "$dir" cp "$srcdir"/"$dir"/Makefile.local "$dir" cp "$srcdir"/"$dir"/Makefile "$dir" done # Emacs only likes to generate compiled files next to the .el files # by default so copy these as well (which is not ideal). cp -a "$srcdir"/emacs/*.el emacs # We were not able to create fully working Makefile using ruby mkmf.rb # so ruby bindings source files are copied as well (ditto -- not ideal). mkdir bindings/ruby cp -a "$srcdir"/bindings/ruby/*.[ch] bindings/ruby cp -a "$srcdir"/bindings/ruby/extconf.rb bindings/ruby fi # Set several defaults (optionally specified by the user in # environment variables) BASHCMD=${BASHCMD:-bash} PERL=${PERL:-perl} CC=${CC:-cc} CXX=${CXX:-c++} CFLAGS=${CFLAGS:--g -O2} CPPFLAGS=${CPPFLAGS:-} CXXFLAGS_for_sh=${CXXFLAGS:-${CFLAGS}} CXXFLAGS=${CXXFLAGS:-\$(CFLAGS)} LDFLAGS=${LDFLAGS:-} XAPIAN_CONFIG=${XAPIAN_CONFIG:-} PYTHON=${PYTHON:-} RUBY=${RUBY:-ruby} # We don't allow the EMACS or GZIP Makefile variables inherit values # from the environment as we do with CC and CXX above. The reason is # that these names as environment variables have existing uses other # than the program name that we want. (EMACS is set to 't' when a # shell is running within emacs and GZIP specifies arguments to pass # on the gzip command line). # Set the defaults for values the user can specify with command-line # options. PREFIX=/usr/local LIBDIR= WITH_DOCS=1 WITH_API_DOCS=1 WITH_EMACS=1 WITH_DESKTOP=1 WITH_BASH=1 WITH_RPATH=1 WITH_RUBY=1 WITH_ZSH=1 WITH_RETRY_LOCK=1 usage () { cat <-- Currently ignored --host=-- Currently ignored --datadir=DIR Currently ignored --localstatedir=DIR Currently ignored --libexecdir=DIR Currently ignored --disable-maintainer-mode Currently ignored --disable-dependency-tracking Currently ignored EOF } # Parse command-line options for option; do if [ "${option}" = '--help' ] ; then usage exit 0 elif [ "${option%%=*}" = '--prefix' ] ; then PREFIX="${option#*=}" elif [ "${option%%=*}" = '--libdir' ] ; then LIBDIR="${option#*=}" elif [ "${option%%=*}" = '--includedir' ] ; then INCLUDEDIR="${option#*=}" elif [ "${option%%=*}" = '--mandir' ] ; then MANDIR="${option#*=}" elif [ "${option%%=*}" = '--infodir' ] ; then INFODIR="${option#*=}" elif [ "${option%%=*}" = '--sysconfdir' ] ; then SYSCONFDIR="${option#*=}" elif [ "${option%%=*}" = '--emacslispdir' ] ; then EMACSLISPDIR="${option#*=}" elif [ "${option%%=*}" = '--emacsetcdir' ] ; then EMACSETCDIR="${option#*=}" elif [ "${option%%=*}" = '--bashcompletiondir' ] ; then BASHCOMPLETIONDIR="${option#*=}" elif [ "${option%%=*}" = '--zshcompletiondir' ] ; then ZSHCOMLETIONDIR="${option#*=}" elif [ "${option%%=*}" = '--with-docs' ]; then if [ "${option#*=}" = 'no' ]; then WITH_DOCS=0 WITH_API_DOCS=0 else WITH_DOCS=1 fi elif [ "${option}" = '--without-docs' ] ; then WITH_DOCS=0 WITH_API_DOCS=0 elif [ "${option%%=*}" = '--with-api-docs' ]; then if [ "${option#*=}" = 'no' ]; then WITH_API_DOCS=0 else WITH_API_DOCS=1 fi elif [ "${option}" = '--without-api-docs' ] ; then WITH_API_DOCS=0 elif [ "${option%%=*}" = '--with-emacs' ]; then if [ "${option#*=}" = 'no' ]; then WITH_EMACS=0 else WITH_EMACS=1 fi elif [ "${option}" = '--without-emacs' ] ; then WITH_EMACS=0 elif [ "${option%%=*}" = '--with-desktop' ]; then if [ "${option#*=}" = 'no' ]; then WITH_DESKTOP=0 else WITH_DESKTOP=1 fi elif [ "${option}" = '--without-desktop' ] ; then WITH_DESKTOP=0 elif [ "${option%%=*}" = '--with-bash-completion' ]; then if [ "${option#*=}" = 'no' ]; then WITH_BASH=0 else WITH_BASH=1 fi elif [ "${option}" = '--without-bash-completion' ] ; then WITH_BASH=0 elif [ "${option%%=*}" = '--with-rpath' ]; then if [ "${option#*=}" = 'no' ]; then WITH_RPATH=0 else WITH_RPATH=1 fi elif [ "${option}" = '--without-rpath' ] ; then WITH_RPATH=0 elif [ "${option%%=*}" = '--with-ruby' ]; then if [ "${option#*=}" = 'no' ]; then WITH_RUBY=0 else WITH_RUBY=1 fi elif [ "${option}" = '--without-ruby' ] ; then WITH_RUBY=0 elif [ "${option%%=*}" = '--with-retry-lock' ]; then if [ "${option#*=}" = 'no' ]; then WITH_RETRY_LOCK=0 else WITH_RETRY_LOCK=1 fi elif [ "${option}" = '--without-retry-lock' ] ; then WITH_RETRY_LOCK=0 elif [ "${option%%=*}" = '--with-zsh-completion' ]; then if [ "${option#*=}" = 'no' ]; then WITH_ZSH=0 else WITH_ZSH=1 fi elif [ "${option}" = '--without-zsh-completion' ] ; then WITH_ZSH=0 elif [ "${option%%=*}" = '--build' ] ; then true elif [ "${option%%=*}" = '--host' ] ; then true elif [ "${option%%=*}" = '--datadir' ] ; then true elif [ "${option%%=*}" = '--localstatedir' ] ; then true elif [ "${option%%=*}" = '--libexecdir' ] ; then true elif [ "${option}" = '--disable-maintainer-mode' ] ; then true elif [ "${option}" = '--disable-dependency-tracking' ] ; then true else echo "Unrecognized option: ${option}" echo "See:" echo " $0 --help" echo "" exit 1 fi done # We set this value early, (rather than just while printing the # Makefile.config file later like most values), because we need to # actually investigate this value compared to the ldconfig_paths value # below. if [ -z "$LIBDIR" ] ; then libdir_expanded="${PREFIX}/lib" else # very non-general variable expansion libdir_expanded=$(printf %s "$LIBDIR" | sed "s|\${prefix}|${PREFIX}|; s|\$prefix\>|${PREFIX}|; s|//*|/|g") fi cat < minimal.c printf "Sanity checking C compilation environment... " test_cmdline="${CC} ${CFLAGS} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal" if ${test_cmdline} > /dev/null 2>&1 then printf "OK.\n" else printf "Fail.\n" errors=$((errors + 1)) printf Executed:; printf ' %s' ${test_cmdline}; echo ${test_cmdline} fi printf "Sanity checking C++ compilation environment... " test_cmdline="${CXX} ${CXXFLAGS_for_sh} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal" if ${test_cmdline} > /dev/null 2>&1 then printf "OK.\n" else printf "Fail.\n" errors=$((errors + 1)) printf Executed:; printf ' %s' ${test_cmdline}; echo ${test_cmdline} fi unset test_cmdline if [ $errors -gt 0 ]; then cat < _libversion.c < #include "lib/notmuch.h" int main(void) { printf("libnotmuch_version_major=%d\n", LIBNOTMUCH_MAJOR_VERSION); printf("libnotmuch_version_minor=%d\n", LIBNOTMUCH_MINOR_VERSION); printf("libnotmuch_version_release=%d\n", LIBNOTMUCH_MICRO_VERSION); return 0; } EOF if ${CC} ${CFLAGS} -I"$srcdir" _libversion.c -o _libversion > /dev/null 2>&1 \ && ./_libversion > _libversion.sh && . ./_libversion.sh then printf "OK.\n" else cat < /dev/null 2>&1; then have_pkg_config=1 else have_pkg_config=0 fi printf "Checking for Xapian development files... " have_xapian=0 for xapian_config in ${XAPIAN_CONFIG} xapian-config xapian-config-1.3; do if ${xapian_config} --version > /dev/null 2>&1; then xapian_version=$(${xapian_config} --version | sed -e 's/.* //') printf "Yes (%s).\n" ${xapian_version} have_xapian=1 xapian_cxxflags=$(${xapian_config} --cxxflags) xapian_ldflags=$(${xapian_config} --libs) break fi done if [ ${have_xapian} = "0" ]; then printf "No.\n" errors=$((errors + 1)) fi have_xapian_compact=0 have_xapian_field_processor=0 if [ ${have_xapian} = "1" ]; then printf "Checking for Xapian compaction support... " cat>_compact.cc< class TestCompactor : public Xapian::Compactor { }; EOF if ${CXX} ${CXXFLAGS_for_sh} ${xapian_cxxflags} -c _compact.cc -o _compact.o > /dev/null 2>&1 then have_xapian_compact=1 printf "Yes.\n" else printf "No.\n" errors=$((errors + 1)) fi rm -f _compact.o _compact.cc printf "Checking for Xapian FieldProcessor API... " cat>_field_processor.cc< class TitleFieldProcessor : public Xapian::FieldProcessor { }; EOF if ${CXX} ${CXXFLAGS_for_sh} ${xapian_cxxflags} -c _field_processor.cc -o _field_processor.o > /dev/null 2>&1 then have_xapian_field_processor=1 printf "Yes.\n" else printf "No. (optional)\n" fi rm -f _field_processor.o _field_processor.cc default_xapian_backend="" # DB_RETRY_LOCK is only supported on Xapian > 1.3.2 have_xapian_db_retry_lock=0 if [ $WITH_RETRY_LOCK = "1" ]; then printf "Checking for Xapian lock retry support... " cat>_retry.cc< int flag = Xapian::DB_RETRY_LOCK; EOF if ${CXX} ${CXXFLAGS_for_sh} ${xapian_cxxflags} -c _retry.cc -o _retry.o > /dev/null 2>&1 then have_xapian_db_retry_lock=1 printf "Yes.\n" else printf "No. (optional)\n" fi rm -f _retry.o _retry.cc fi printf "Testing default Xapian backend... " cat >_default_backend.cc < int main(int argc, char** argv) { Xapian::WritableDatabase db("test.db",Xapian::DB_CREATE_OR_OPEN); } EOF ${CXX} ${CXXFLAGS_for_sh} ${xapian_cxxflags} _default_backend.cc -o _default_backend ${xapian_ldflags} ./_default_backend if [ -f test.db/iamglass ]; then default_xapian_backend=glass else default_xapian_backend=chert fi printf "%s\n" "${default_xapian_backend}"; rm -rf test.db _default_backend _default_backend.cc fi GMIME_MINVER=3.0.3 printf "Checking for GMime development files... " if pkg-config --exists "gmime-3.0 > $GMIME_MINVER"; then printf "Yes.\n" have_gmime=1 gmime_cflags=$(pkg-config --cflags gmime-3.0) gmime_ldflags=$(pkg-config --libs gmime-3.0) printf "Checking for GMime session key extraction support... " cat > _check_session_keys.c < #include int main () { GError *error = NULL; GMimeParser *parser = NULL; GMimeMultipartEncrypted *body = NULL; GMimeDecryptResult *decrypt_result = NULL; GMimeObject *output = NULL; g_mime_init (); parser = g_mime_parser_new (); g_mime_parser_init_with_stream (parser, g_mime_stream_file_open("test/corpora/crypto/basic-encrypted.eml", "r", &error)); if (error) return !! fprintf (stderr, "failed to instantiate parser with test/corpora/crypto/basic-encrypted.eml\n"); body = GMIME_MULTIPART_ENCRYPTED(g_mime_message_get_mime_part (g_mime_parser_construct_message (parser, NULL))); if (body == NULL) return !! fprintf (stderr, "did not find a multipart encrypted message\n"); output = g_mime_multipart_encrypted_decrypt (body, GMIME_DECRYPT_EXPORT_SESSION_KEY, NULL, &decrypt_result, &error); if (error || output == NULL) return !! fprintf (stderr, "decryption failed\n"); if (decrypt_result == NULL) return !! fprintf (stderr, "no GMimeDecryptResult found\n"); if (decrypt_result->session_key == NULL) return !! fprintf (stderr, "GMimeDecryptResult has no session key\n"); printf ("%s\n", decrypt_result->session_key); return 0; } EOF if ${CC} ${CFLAGS} ${gmime_cflags} ${gmime_ldflags} _check_session_keys.c -o _check_session_keys > /dev/null 2>&1 \ && TEMP_GPG=$(mktemp -d) \ && GNUPGHOME=${TEMP_GPG} gpg --batch --quiet --import < test/gnupg-secret-key.asc \ && SESSION_KEY=$(GNUPGHOME=${TEMP_GPG} ./_check_session_keys) \ && [ $SESSION_KEY = 9:0BACD64099D1468AB07C796F0C0AC4851948A658A15B34E803865E9FC635F2F5 ] then printf "OK.\n" else cat <= 2.12, but we use at least one Glib # function that only exists as of 2.22, (g_array_unref) printf "Checking for Glib development files (>= 2.22)... " have_glib=0 if pkg-config --exists 'glib-2.0 >= 2.22'; then printf "Yes.\n" have_glib=1 # these are included in gmime cflags and ldflags # glib_cflags=$(pkg-config --cflags glib-2.0) # glib_ldflags=$(pkg-config --libs glib-2.0) else printf "No.\n" errors=$((errors + 1)) fi if ! pkg-config --exists zlib; then ${CC} -o compat/gen_zlib_pc "$srcdir"/compat/gen_zlib_pc.c >/dev/null 2>&1 && compat/gen_zlib_pc > compat/zlib.pc && PKG_CONFIG_PATH="$PKG_CONFIG_PATH":compat && export PKG_CONFIG_PATH rm -f compat/gen_zlib_pc fi printf "Checking for zlib (>= 1.2.5.2)... " have_zlib=0 if pkg-config --atleast-version=1.2.5.2 zlib; then printf "Yes.\n" have_zlib=1 zlib_cflags=$(pkg-config --cflags zlib) zlib_ldflags=$(pkg-config --libs zlib) else printf "No.\n" errors=$((errors + 1)) fi printf "Checking for talloc development files... " if pkg-config --exists talloc; then printf "Yes.\n" have_talloc=1 talloc_cflags=$(pkg-config --cflags talloc) talloc_ldflags=$(pkg-config --libs talloc) else printf "No.\n" have_talloc=0 talloc_cflags= errors=$((errors + 1)) fi printf "Checking for bash... " if command -v ${BASHCMD} > /dev/null; then have_bash=1 bash_absolute=$(command -v ${BASHCMD}) printf "Yes (%s).\n" "$bash_absolute" else have_bash=0 printf "No. (%s not found)\n" "${BASHCMD}" fi printf "Checking for perl... " if command -v ${PERL} > /dev/null; then have_perl=1 perl_absolute=$(command -v ${PERL}) printf "Yes (%s).\n" "$perl_absolute" else have_perl=0 printf "No. (%s not found)\n" "${PERL}" fi printf "Checking for python... " have_python=0 for name in ${PYTHON} python3 python python2; do if command -v $name > /dev/null; then have_python=1 python=$name printf "Yes (%s).\n" "$name" break fi done if [ $have_python -eq 0 ]; then printf "No.\n" errors=$((errors + 1)) fi printf "Checking for valgrind development files... " if pkg-config --exists valgrind; then printf "Yes.\n" have_valgrind=1 valgrind_cflags=$(pkg-config --cflags valgrind) else printf "No (but that's fine).\n" have_valgrind=0 valgrind_cflags= fi printf "Checking for bash-completion (>= 1.90)... " if pkg-config --atleast-version=1.90 bash-completion; then printf "Yes.\n" else printf "No (will not install bash completion).\n" WITH_BASH=0 fi if [ -z "${EMACSLISPDIR-}" ]; then EMACSLISPDIR="\$(prefix)/share/emacs/site-lisp" fi if [ -z "${EMACSETCDIR-}" ]; then EMACSETCDIR="\$(prefix)/share/emacs/site-lisp" fi printf "Checking if emacs (>= 24) is available... " if emacs --quick --batch --eval '(if (< emacs-major-version 24) (kill-emacs 1))' > /dev/null 2>&1; then printf "Yes.\n" have_emacs=1 else printf "No (so will not byte-compile emacs code)\n" have_emacs=0 fi have_doxygen=0 if [ $WITH_API_DOCS = "1" ] ; then printf "Checking if doxygen is available... " if command -v doxygen > /dev/null; then printf "Yes.\n" have_doxygen=1 else printf "No (so will not install api docs)\n" fi fi have_ruby_dev=0 if [ $WITH_RUBY = "1" ] ; then printf "Checking for ruby development files... " if ${RUBY} -e "require 'mkmf'"> /dev/null 2>&1; then printf "Yes.\n" have_ruby_dev=1 else printf "No (skipping ruby bindings)\n" fi fi have_sphinx=0 have_makeinfo=0 have_install_info=0 if [ $WITH_DOCS = "1" ] ; then printf "Checking if sphinx is available and supports nroff output... " if command -v sphinx-build > /dev/null && ${python} -m sphinx.writers.manpage > /dev/null 2>&1 ; then printf "Yes.\n" have_sphinx=1 else printf "No (so will not install man pages).\n" fi printf "Checking if makeinfo is available... " if command -v makeinfo > /dev/null; then printf "Yes.\n" have_makeinfo=1 else printf "No (so will not build info pages).\n" fi printf "Checking if install-info is available... " if command -v install-info > /dev/null; then printf "Yes.\n" have_install_info=1 else printf "No (so will not install info pages).\n" fi fi if [ $WITH_DESKTOP = "1" ]; then printf "Checking if desktop-file-install is available... " if command -v desktop-file-install > /dev/null; then printf "Yes.\n" else printf "No (so will not install .desktop file).\n" WITH_DESKTOP=0 fi fi printf "Checking for cppcheck... " if command -v cppcheck > /dev/null; then have_cppcheck=1 printf "Yes.\n" else have_cppcheck=0 printf "No.\n" fi libdir_in_ldconfig=0 printf "Checking which platform we are on... " uname=$(uname) if [ $uname = "Darwin" ] ; then printf "Mac OS X.\n" platform=MACOSX linker_resolves_library_dependencies=0 elif [ $uname = "SunOS" ] ; then printf "Solaris.\n" platform=SOLARIS linker_resolves_library_dependencies=0 elif [ $uname = "FreeBSD" ] ; then printf "FreeBSD.\n" platform=FREEBSD linker_resolves_library_dependencies=0 elif [ $uname = "OpenBSD" ] ; then printf "OpenBSD.\n" platform=OPENBSD linker_resolves_library_dependencies=0 elif [ $uname = "Linux" ] || [ $uname = "GNU" ] ; then printf "%s\n" "$uname" platform="$uname" linker_resolves_library_dependencies=1 printf "Checking for %s in ldconfig... " "$libdir_expanded" ldconfig_paths=$(/sbin/ldconfig -N -X -v 2>/dev/null | sed -n -e 's,^\(/.*\):\( (.*)\)\?$,\1,p') # Separate ldconfig_paths only on newline (not on any potential # embedded space characters in any filenames). Note, we use a # literal newline in the source here rather than something like: # # IFS=$(printf '\n') # # because the shell's command substitution deletes any trailing newlines. IFS=" " for path in $ldconfig_paths; do if [ "$path" -ef "$libdir_expanded" ]; then libdir_in_ldconfig=1 fi done IFS=$DEFAULT_IFS if [ "$libdir_in_ldconfig" = '0' ]; then printf "No (will set RPATH)\n" else printf "Yes\n" fi else printf "Unknown.\n" platform="$uname" linker_resolves_library_dependencies=0 cat <= version 1.2.6, including development files such as headers)" echo " https://xapian.org/" fi if [ $have_zlib -eq 0 ]; then echo " zlib library (>= version 1.2.5.2, including development files such as headers)" echo " https://zlib.net/" echo fi if [ $have_gmime -eq 0 ]; then echo " GMime library >= $GMIME_MINVER" echo " (including development files such as headers)" echo " https://github.com/jstedfast/gmime/" echo fi if [ $have_glib -eq 0 ]; then echo " Glib library >= 2.22 (including development files such as headers)" echo " https://ftp.gnome.org/pub/gnome/sources/glib/" echo fi if [ $have_talloc -eq 0 ]; then echo " The talloc library (including development files such as headers)" echo " https://talloc.samba.org/" echo fi cat < /dev/null 2>&1 then printf "Yes.\n" have_canonicalize_file_name=1 else printf "No (will use our own instead).\n" have_canonicalize_file_name=0 fi rm -f compat/have_canonicalize_file_name printf "Checking for getline... " if ${CC} -o compat/have_getline "$srcdir"/compat/have_getline.c > /dev/null 2>&1 then printf "Yes.\n" have_getline=1 else printf "No (will use our own instead).\n" have_getline=0 fi rm -f compat/have_getline printf "Checking for strcasestr... " if ${CC} -o compat/have_strcasestr "$srcdir"/compat/have_strcasestr.c > /dev/null 2>&1 then printf "Yes.\n" have_strcasestr=1 else printf "No (will use our own instead).\n" have_strcasestr=0 fi rm -f compat/have_strcasestr printf "Checking for strsep... " if ${CC} -o compat/have_strsep "$srcdir"/compat/have_strsep.c > /dev/null 2>&1 then printf "Yes.\n" have_strsep="1" else printf "No (will use our own instead).\n" have_strsep="0" fi rm -f compat/have_strsep printf "Checking for timegm... " if ${CC} -o compat/have_timegm "$srcdir"/compat/have_timegm.c > /dev/null 2>&1 then printf "Yes.\n" have_timegm="1" else printf "No (will use our own instead).\n" have_timegm="0" fi rm -f compat/have_timegm printf "Checking for dirent.d_type... " if ${CC} -o compat/have_d_type "$srcdir"/compat/have_d_type.c > /dev/null 2>&1 then printf "Yes.\n" have_d_type="1" else printf "No (will use stat instead).\n" have_d_type="0" fi rm -f compat/have_d_type printf "Checking for standard version of getpwuid_r... " if ${CC} -o compat/check_getpwuid "$srcdir"/compat/check_getpwuid.c > /dev/null 2>&1 then printf "Yes.\n" std_getpwuid=1 else printf "No (will define _POSIX_PTHREAD_SEMANTICS to get it).\n" std_getpwuid=0 fi rm -f compat/check_getpwuid printf "Checking for standard version of asctime_r... " if ${CC} -o compat/check_asctime "$srcdir"/compat/check_asctime.c > /dev/null 2>&1 then printf "Yes.\n" std_asctime=1 else printf "No (will define _POSIX_PTHREAD_SEMANTICS to get it).\n" std_asctime=0 fi rm -f compat/check_asctime printf "Checking for rpath support... " if [ $WITH_RPATH = "1" ] && ${CC} -Wl,--enable-new-dtags -Wl,-rpath,/tmp/ -o minimal minimal.c >/dev/null 2>&1 then printf "Yes.\n" rpath_ldflags="-Wl,--enable-new-dtags -Wl,-rpath,\$(libdir)" else printf "No (nothing to worry about).\n" rpath_ldflags="" fi printf "Checking for -Wl,--as-needed... " if ${CC} -Wl,--as-needed -o minimal minimal.c >/dev/null 2>&1 then printf "Yes.\n" as_needed_ldflags="-Wl,--as-needed" else printf "No (nothing to worry about).\n" as_needed_ldflags="" fi printf "Checking for -Wl,--no-undefined... " if ${CC} -Wl,--no-undefined -o minimal minimal.c >/dev/null 2>&1 then printf "Yes.\n" no_undefined_ldflags="-Wl,--no-undefined" else printf "No (nothing to worry about).\n" no_undefined_ldflags="" fi WARN_CXXFLAGS="" printf "Checking for available C++ compiler warning flags... " for flag in -Wall -Wextra -Wwrite-strings; do if ${CC} $flag -o minimal minimal.c > /dev/null 2>&1 then WARN_CXXFLAGS="${WARN_CXXFLAGS}${WARN_CXXFLAGS:+ }${flag}" fi done printf "\n\t%s\n" "${WARN_CXXFLAGS}" WARN_CFLAGS="${WARN_CXXFLAGS}" printf "Checking for available C compiler warning flags... " for flag in -Wmissing-declarations; do if ${CC} $flag -o minimal minimal.c > /dev/null 2>&1 then WARN_CFLAGS="${WARN_CFLAGS}${WARN_CFLAGS:+ }${flag}" fi done printf "\n\t%s\n" "${WARN_CFLAGS}" rm -f minimal minimal.c _libversion.c _libversion _libversion.sh # construct the Makefile.config cat > Makefile.config < sh.config <