multiple consecutive spaces in CFLAGS cause the build to fail at configuring PCRE Reproducible: Always Steps to Reproduce: 1.CFLAGS="-O2 \ -pipe" 2. emerge apache Actual Results: Configuring PCRE regular expression library ... updating cache /var/tmp/portage/apache-2.0.54-r31/work/httpd-2.0.54/config.cache configuring package in srclib/pcre now configure: WARNING: If you wanted to set the --build type, don't use --host. If a cross compiler is detected then cross compile mode will be used. configure: loading cache /var/tmp/portage/apache-2.0.54-r31/work/httpd-2.0.54/ config.cache configure: error: `CFLAGS' has changed since the previous run: configure: former value: -O2 -pipe -march=athlon-tbird -maccumulate-outgoing-args -mcpu=athlon-tbird -momit- leaf-frame-pointer -mfpmath=387 -mtune=athlon-tbird -fexpensive-optimizations -fmove-all- movables -fomit-frame-pointer -fprefetch-loop-arrays -frerun-cse-after-loop -frerun-loop-opt -ftracer configure: current value: -O2 -pipe -march=athlon-tbird -maccumulate-outgoing- args -mcpu=athlon-tbird -momit-leaf-frame-pointer -mfpmath=387 -mtune=athlon- tbird -fexpensive-optimizations -fmove-all-movables -fomit-frame-pointer - fprefetch-loop-arrays -frerun-cse-after-loop -frerun-loop-opt -ftracer configure: error: changes in the environment can compromise the build configure: error: run `make distclean' and/or `rm /var/tmp/portage/apache-2.0. 54-r31/work/httpd-2.0.54/config.cache' and start over configure failed for srclib/pcre !!! ERROR: net-www/apache-2.0.54-r31 failed. !!! Function src_compile, Line 161, Exitcode 1 !!! bad ./configure please submit bug report to bugs.gentoo.org. Include your config.layout and config.log !!! If you need support, post the topmost build error, NOT this status message. Expected Results: successful compile Portage 2.0.52-r1 (default-linux/x86/2005.0, gcc-3.4.4, glibc-2.3.5-r1, 2.6.12- gentoo-r3.peladrine i686) ================================================================= System uname: 2.6.12-gentoo-r3.peladrine i686 AMD Duron(tm) Processor Gentoo Base System version 1.12.0_pre6 distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled] ccache version 2.4 [enabled] dev-lang/python: 2.3.5, 2.4.1-r1 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.18-r1 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -pipe -march=athlon-tbird -maccumulate- outgoing-args -mcpu=athlon-tbird -momit-leaf-frame- pointer -mfpmath=387 -mtune=athlon-tbird -fexpensive-optimizations -fmove-all-movables -fomit-frame-pointer -fprefetch-loop-arrays -frerun-cse- after-loop -frerun-loop-opt -ftracer " CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/ config /var/bind /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/texmf/web2c /etc/env.d" CXXFLAGS="-O2 -pipe -march=athlon-tbird -maccumulate- outgoing-args -mcpu=athlon-tbird -momit-leaf-frame- pointer -mfpmath=387 -mtune=athlon-tbird -fexpensive-optimizations -fmove-all-movables -fomit-frame-pointer -fprefetch-loop-arrays -frerun-cse- after-loop -frerun-loop-opt -ftracer -fvisibility-inlines-hidden" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distcc distlocks fixpackages sandbox sfperms strict" GENTOO_MIRRORS="http://mirror.isp.net.au/pub/gentoo/ http://mirror.aarnet.edu. au/pub/gentoo/ http://mirror.pacific.net.au/linux/Gentoo" MAKEOPTS="-j6" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://mirror.wa.3fl.net/gentoo-portage" USE="3dnow 3dnowext X509 a52 aac acpi alsa apache2 apm atm avi bash-completion berkdb bind-mysql bitmap-fonts bzip2 bzlib caps cgi crypt curl dba dedicated divx4linux djbfft dts dvd eds emboss encode erandom exif extensions fame fastcgi foomaticdb fortran ftp gd gd-external gdbm gif glibc-omitfp gnutls gpm gstreamer gtk2 hpn imagemagick imagemajick imlib inifile ipv6 ithreads jpeg junit libg++ libwww linuxthreads-tls lzo mad math mbox memlimit mhash mikmod mime mjpeg mmap mmx mmxext mod_perl mod_php mp3 mpeg mpm-prefork mysql mysqli ncurses network nls nocd nojoystick novideo nptl offensive ogg oggvorbis oss pam pam_chroot pam_console pam_timestamp pcre pdflib perl php png posix pvm python readline samba session shared sharedext sharedmem soap sockets socks5 sse ssl tcpd tetex threads tokenizer truetype-fonts type1-fonts usb userlocales vhosts vorbis win32codecs x86 xinetd xml xml2 xmlrpc xsl xvid yv12 zip zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS
Fixing this on per-ebuild level is waste of time. See Bug 106513.