Changeset 1035

Timestamp:

05/22/06 13:57:28 (3 years ago)

Author:

archaic

Message:

Updated: intel-c-compiler.txt trunk.

Files:

• trunk/intel-c-compiler.txt (modified) (9 diffs)

trunk/intel-c-compiler.txt

@@ -2 +2 @@
-        Daniel Baumann <daniel.baumann at panthera-systems.net>
-
-19
+22
-
-LICENSE: GNU General Public License
@@ -15 +15 @@
-
-PREREQUISITES:
-this does not work with AMD or other non-Intel
+Intel-clones/AMD may or may not work
-Glibc (icc is linked to /lib/ld-linux.so.2).
-
@@ -34 +34 @@
-http://gentoo-wiki.com/HOWTO_ICC_and_Portage
-
-free, and there is no source provided
+opensource
-
-This hint will give instructions to build supported software with ICC, so that
@@ -43 +43 @@
-provided to enable profiling; this means compiling packages twice, but they
-should run a bit faster. The difference between runtimes of a program compiled
-22
+40
-
-For even more performance, also see the prelink.txt hint, the optimization.txt
@@ -198 +198 @@
-rm -f /usr/lib/libgcc_s.so*
-
-u
+o
-# library should be moved to /lib:
-
@@ -213 +213 @@
-export ICC_CFLAGS="-ip -xP -O3"
-export ICC_CXXFLAGS="$ICC_CFLAGS"
+
+# Interprocedural optimizations (IPO) is a fantastic feature which optimizes
+# executables at link time. This allows the compiler to make better judgements.
+# A similiar option was added to GCC-4.1, -fwhole-program --combine. Using this
+# option is a bit touchy though. The -ipo flag can only be used on executables,
+# and not static libraries. Almost every package has static libraries which are
+# linked into the programs during the build. The HLFS book happens to use the
+# -fpie option which has the same requirements. To use the ICC -ipo option, check
+# the HLFS book for the sed commands which add -fpie to Makefile.in's. Replace the
+# "-pie -fpie" with "-ipo". The sed command for each package is different.
+# Unfortunetly these commands are not available for most of the BLFS packages.
-
-# Run this to break GCC compatability (some packages need this):
@@ -241 +252 @@
-# programs and generate profiling data. If you are able to run the programs better
-# than how 'make check' does, then I suggest you do that. Then 'make clean', and
-finally make again with "-prof_use". You can run 'make check' again if you like,
-and
+make again with "-prof_use". You can run 'make check' again if you like, and
+finally
-
-# In general, use this:
-
-env CFLAGS="$ICC_CFLAGS -prof_gen -prof_dir=$(pwd)" \
-
+XX
-        LANG="en" LANGUAGE="en" CC="icc" CXX="icpc" ./configure...
-
-# Then 'make && make check && make clean', and final build with:
-
-
-
-
-
+
+
+
+
+
-
-# DB can not be compiled with ICC.
@@ -308 +320 @@
-# And 'make' and 'make install'.
-
+# Warning! Building Perl with profiling has frozen my desktop, beware.
-# Perl can compile with ICC profiling. After 'make distclean' you will have to
-# run ./configure again, substituting -prof_gen with -prof_use.
@@ -597 +610 @@
-[2006-05-19]
-        * Run 'make check' after building with prof_gen, to generate profiling data.
-
+
+