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Autoconf Macro: ax_cc_maxopt
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<h1>
ax_cc_maxopt
</h1>
<h2>
SYNOPSIS
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_CC_MAXOPT</code>
</p>
<h2>
DESCRIPTION
</h2>
<div class="indent">
<p>
Try to turn on "good" C optimization flags for various compilers and
architectures, for some definition of "good". (In our case, good for FFTW
and hopefully for other scientific codes. Modify as needed.)
</p>
<p>
The user can override the flags by setting the CFLAGS environment variable.
The user can also specify --enable-portable-binary in order to disable any
optimization flags that might result in a binary that only runs on the host
architecture.
</p>
<p>
Note also that the flags assume that ANSI C aliasing rules are followed by
the code (e.g. for gcc's -fstrict-aliasing), and that floating-point
computations can be re-ordered as needed.
</p>
<p>
Requires macros: <a href=
"ax_check_compiler_flags.html">AX_CHECK_COMPILER_FLAGS</a>, <a href=
"ax_compiler_vendor.html">AX_COMPILER_VENDOR</a>, <a href=
"ax_gcc_archflag.html">AX_GCC_ARCHFLAG</a>, <a href=
"ax_gcc_x86_cpuid.html">AX_GCC_X86_CPUID</a>.
</p>
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<h2>
SOURCE CODE
</h2>
<p class="indent">
<a href=
"http://autoconf-archive.cryp.to/ax_cc_maxopt.m4">http://autoconf-archive.cryp.to/ax_cc_maxopt.m4</a>
</p>
<h2>
LICENSE
</h2>
<div class="indent">
<p style="white-space:nowrap;">
Copyright © 2008 Steven G. Johnson <stevenj@alum.mit.edu><br>
Copyright © 2008 Matteo Frigo
</p>
<p>
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
</p>
<p>
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
</p>
<p>
You should have received a copy of the GNU General Public License along
with this program. If not, see <<a href=
"http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>>.
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