During the compilation of libvirt, I just see a very minor bug, it prints gcc instead of $CC (in my case x86_64-pc-linux-gnu-gcc) checking whether gcc -Wformat allows NULL strings... yes
You really must provide more useful information when reporting bugs. Please tell us what libvirt vesion you are using, what platform you're building on, and include the full output of 'configure' as an attachment.
Created attachment 783968 [details] build log Portage 2.1.13.2 (default/linux/amd64/13.0, gcc-4.6.3, glibc-2.15-r3, 3.8.13-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.8.13-gentoo-x86_64-Intel-R-_Core-TM-_i7-2600K_CPU_.2 KiB Mem: 2055892 total, 512552 free KiB Swap: 2263820 total, 2261700 free Timestamp of tree: Wed, 07 Aug 2013 12:30:01 +0000 ld GNU ld (GNU Binutils) 2.23.1 app-shells/bash: 4.2_p45 dev-lang/python: 2.7.5, 3.2.5-r1 dev-util/cmake: 2.8.10.2-r2 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6, 1.12.6 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.6.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.7 (virtual/os-headers) sys-libs/glibc: 2.15-r3 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -g0 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/apache2-php5.4/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps y --keep-going y -1" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs collision-protect config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms sign split-log 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fy_NL ga_IE gu gu_IN hi hi_IN is ka kn ml mr nn_NO or pa pa_IN pt_PT rm si sq sv_SE ta ta_LK te th vi ast dz km my om sh ug uz ca@valencia sr@ijekavian sr@ijekavianlatin sr@latin csb hne mai se es_LA fr_CA zh_HK br la no es_CR et_EE sr_CS bo hsb hy mn sr@Latn lb ne bs tg uz@cyrillic xh be_BY brx ca_XV dgo en_ZA gd kok ks ky lo mni nr ns pap ps rw sa_IN sat sd ss st sw_TZ ti ts ve mt ia az me tl ak hy_AM lg nso son ur_PK it fr nb nb_NO hr nan ur tk cs_CZ da_DK de_1901 de_CH en_AU lt_LT pl_PL sa sk_SK th_TH ta_IN tt sco ha mi ven ar_SY el_GR ro_RO ru_RU sl_SI uk_UA vi_VN ar_SY te_IN de_DE es_VE fa_IR fr_FR hu_HU id_ID it_IT ja_JP ka_GE nl_NL sr_BA sr_RS ca_ES fi_FI he_IL jv ru_gold yi eu_ES chr jp bg_BG ko_KR" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-3 php5-4" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" QEMU_SOFTMMU_TARGETS="x86_64" QEMU_USER_TARGETS="x86_64" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" USE_PYTHON="2.7 3.2" Unset: CPPFLAGS, CTARGET, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS ================================================================= Package Settings ================================================================= app-emulation/libvirt-1.1.1-r1 was built with the following: USE="caps libvirtd macvtap nls policykit qemu udev vepa -audit -avahi -firewalld -fuse -iscsi -lvm -lxc -nfs -numa -openvz -parted -pcap -phyp -python -rbd -sasl (-selinux) -systemd -uml -virt-network -virtualbox -xen" PYTHON_SINGLE_TARGET="python2_7 -python2_5 -python2_6" PYTHON_TARGETS="python2_7 -python2_5 -python2_6"
The issue is cosmetic - there are merely two strings in m4/virt-compile-warnings.m4 that hard-code the string gcc instead of referring to the more generic "C compiler" or "$CC" terminology. A patch is very trivial, but even without the patch, libvirt is still behaving correctly for your alternative compiler.
(In reply to Eric Blake from comment #3) > The issue is cosmetic - there are merely two strings in > m4/virt-compile-warnings.m4 that hard-code the string gcc instead of > referring to the more generic "C compiler" or "$CC" terminology. A patch is > very trivial, but even without the patch, libvirt is still behaving > correctly for your alternative compiler. I know, infact the summary says print instead of use. The behavior is correct, the config.log uses the correct $CC, but it prints wrong.
It would have been faster to propose a patch than to jump through BZ hoops trying to get someone else to understand your complaint... Libvirt 1.1.2 will contain this patch. commit ff38690be97088a399d3a7eab4a3b07f9194ab70 Author: Eric Blake <eblake> Date: Wed Aug 7 09:44:52 2013 -0600 maint: the compiler is not always named gcc https://bugzilla.redhat.com/show_bug.cgi?id=994589 complained that even when using a cross-compiler not named 'gcc', the configure output confusingly referred to gcc. * m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Use a more generic statement in configure output. Signed-off-by: Eric Blake <eblake>