The -march=pentium4 problem seems to be generally solved in gcc-3.2.3 and gcc-3.3, so -march=pentium4 shouldn't be replaced with -march=pentium3 for >=gcc-3.2.3. This applies for the mozilla/firebird/phoenix ebuilds, and probably for any other ebuilds where -march=pentium4 is replaced. I have successfully compiled mozilla with -march=pentium4 using gcc-3.2.3-r1. This is the part of the mozilla ebuild that needs to be changed: if [ "$(gcc-major-version)" -eq "3" ] then # Currently gcc-3.2 or older do not work well if we specify "-march" # and other optimizations for pentium4. export CFLAGS="${CFLAGS/-march=pentium4/-march=pentium3}" export CXXFLAGS="${CXXFLAGS/-march=pentium4/-march=pentium3}" This should be adjusted to only apply for gcc-versions older than gcc-3.2.3. Reproducible: Always Steps to Reproduce: 1. Install gcc-3.2.3 or newer on a pc with an Intel Pentium4 processor. 2. Edit your CFLAGS to include -march=pentium4. 3. Edit the mozilla ebuild to not replace -march=pentium4 with -march=pentium3. Then emerge mozilla. It should work without a problem. Actual Results: Emerged and ran successfully. Expected Results: Should have given me an error when compiling, or other errors after, if the -march=pentium4 replacement was needed.
I've had -march=pentium4 ever since I installed Gentoo on my new workstation. I bootstrapped with gcc-3.2.3. I haven't had any stability or otherwise atypical problems. #cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 3.06GHz stepping : 7 cpu MHz : 3066.576 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm bogomips : 6094.84
Are you sure you compiled mozilla with those CFLAGS? Mozilla overrides CFLAGS as it has hardcoded some options. Follow http://bugzilla.mozilla.org/show_bug.cgi?id=232748 .
I work on the mozilla ebuilds but don't have pentium4 expertise. I'll ask somebody in Gentoo who does to comment on this bug
Sounds like we need a has_version test for the broken versions of gcc for pentium4
Fixed in mozilla-1.7_rc1 and mozilla-firefox-0.8-r3 ... I don't think this is worth bothering to change in mozilla-1.6. Thanks!
