Changeset e4a8439

Timestamp:

02/17/2019 05:20:47 PM (5 years ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 12.0, 12.1, 8.4, 9.0, 9.1, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, upgradedb, xry111/intltool, xry111/llvm18, xry111/soup3, xry111/test-20220226, xry111/xf86-video-removal

Children:

2d53833

Parents:

cd148f4

Message:

Build fftw three times for different numeerical precisions.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@21186 af4574ff-66df-0310-9fd7-8a98e5e911e0

File:

• general/genlib/fftw.xml (modified) (3 diffs)

general/genlib/fftw.xml

@@ -10 +10 @@
   <!ENTITY fftw-size          "3.9 MB">
   <!ENTITY fftw-buildsize     "57 MB (add 1 MB for tests)">
-  <!ENTITY fftw-time          "0.3 SBU (using parallelism=4; add 1.9 SBU for tests)">
+  <!ENTITY fftw-time          "1.6 SBU (using parallelism=4; add 1.9 SBU for tests)">
 ]>
 
@@ -82 +82 @@
     <title>Installation of fftw</title>
 
-    <para>
+    <note><para>We build fftw three times for different libraries that
+    suport different numerical precisions.</para></note>
+
+    <para>
+      The first build is for double precision arithmetic.
       Install <application>fftw</application> by running the following commands:
     </para>
 
-<screen><userinput>./configure --prefix=/usr  --enable-shared --enable-threads &amp;&amp;
+<screen><userinput>./configure --prefix=/usr    \
+            --enable-shared  \
+            --enable-threads \
+            --enable-sse2    \
+            --enable-avx     &amp;&amp;
 make</userinput></screen>
 
@@ -98 +106 @@
 
 <screen role="root"><userinput>make install</userinput></screen>
+
+    <para>Now build single precision:</para>
+
+<screen><userinput>make clean &amp;&amp;
+
+./configure --prefix=/usr    \
+            --enable-shared  \
+            --enable-threads \
+            --enable-sse2    \
+            --enable-avx     \
+            --enable-float   &amp;&amp;
+make</userinput></screen>
+
+    <para>
+      As the <systemitem class="username">root</systemitem> user:
+    </para>
+
+<screen role="root"><userinput>make install</userinput></screen>
+
+    <para>Finally, build lomg double precision:</para>
+
+<screen><userinput>make clean &amp;&amp;
+
+./configure --prefix=/usr    \
+            --enable-shared  \
+            --enable-threads \
+            --enable-long-double &amp;&amp;
+make</userinput></screen>
+
+    <para>
+      As the <systemitem class="username">root</systemitem> user:
+    </para>
+
+<screen role="root"><userinput>make install</userinput></screen>
+
   </sect2>