| --- make.conf.example |
| +++ make.conf.example |
| @@ -22,6 +22,11 @@ |
| # Example: |
| #USE="X gtk gnome -alsa" |
| |
| +# Host Setting |
| +# ============ |
| +# |
| +CHOST="x86_64-pc-linux-gnu" |
| + |
| # Host and optimization settings |
| # ============================== |
| # |
| @@ -39,10 +44,35 @@ |
| # -frecord-gcc-switches, since otherwise the check could result in false |
| # positive results. |
| # |
| -# Please refer to the GCC manual for a list of possible values. |
| +# -mcpu=<cpu-type> means optimize code for the particular type of CPU without |
| +# breaking compatibility with other CPUs. GCC 3.4 has deprecated support for |
| +# -mcpu, so use -mtune instead if using this compiler. |
| +# |
| +# -march=<cpu-type> means to take full advantage of the ABI and instructions |
| +# for the particular CPU; this will break compatibility with older CPUs (for |
| +# example, -march=athlon-xp code will not run on a regular Athlon, and |
| +# -march=i686 code will not run on a Pentium Classic.) |
| +# |
| +# CPU types supported in gcc-3.2 and higher: athlon-xp, athlon-mp, |
| +# athlon-tbird, athlon, k6, k6-2, k6-3, i386, i486, i586 (Pentium), i686 |
| +# (PentiumPro), pentium, pentium-mmx, pentiumpro, pentium2 (Celeron), |
| +# pentium3, and pentium4. |
| +# |
| +# Note that Gentoo Linux 1.4 and higher include at least gcc-3.2. |
| +# |
| +# amd64 CPU types supported in gcc-3.4: athlon64, opteron, k8 |
| +# |
| +# CRITICAL WARNINGS: ****************************************************** # |
| +# K6 markings are deceptive. Avoid setting -march for them. See Bug #24379. # |
| +# Pentium-M CPUs should not enable sse2 until at least gcc-3.4. Bug 50616. # |
| +# GCC 3.3 doesnt support an amd64 specific -march setting, use 3.4. # |
| +# ************************************************************************* # |
| # |
| -#CFLAGS="-O2 -pipe" |
| +# Decent examples: |
| # |
| +#CFLAGS="-mtune=k8 -O2 -pipe" |
| +#CFLAGS="-march=athlon64 -O2 -pipe" |
| + |
| # If you set a CFLAGS above, then this line will set your default C++ flags to |
| # the same settings. |
| #CXXFLAGS="${CFLAGS}" |
| @@ -76,7 +106,7 @@ |
| # DO NOT PUT ANYTHING BUT YOUR SPECIFIC ~ARCHITECTURE IN THE LIST. |
| # IF YOU ARE UNSURE OF YOUR ARCH, OR THE IMPLICATIONS, DO NOT MODIFY THIS. |
| # |
| -#ACCEPT_KEYWORDS="~arch" |
| +#ACCEPT_KEYWORDS="~amd64" |
| |
| # ACCEPT_LICENSE is used to mask packages based on licensing restrictions. |
| # It may contain both license and group names, where group names are |
