Disable CPU optimizations not supported by all x86_64 systems.

--- a/cmake/modules/SIMDExt.cmake	2017-03-23 22:22:58.254071694 +0100
+++ b/cmake/modules/SIMDExt.cmake	2017-03-23 22:23:22.446848845 +0100
@@ -5,11 +5,6 @@
 # HAVE_ARM_NEON
 # HAVE_INTEL_SSE
 # HAVE_INTEL_SSE2
-# HAVE_INTEL_SSE3
-# HAVE_INTEL_SSSE3
-# HAVE_INTEL_PCLMUL
-# HAVE_INTEL_SSE4_1
-# HAVE_INTEL_SSE4_2
 #
 # SIMD_COMPILE_FLAGS
 #
@@ -85,26 +80,6 @@
       if(HAVE_INTEL_SSE2)
         set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse2")
       endif()
-      CHECK_C_COMPILER_FLAG(-msse3 HAVE_INTEL_SSE3)
-      if(HAVE_INTEL_SSE3)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse3")
-      endif()
-      CHECK_C_COMPILER_FLAG(-mssse3 HAVE_INTEL_SSSE3)
-      if(HAVE_INTEL_SSSE3)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mssse3")
-      endif()
-      CHECK_C_COMPILER_FLAG(-mpclmul HAVE_INTEL_PCLMUL)
-      if(HAVE_INTEL_PCLMUL)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mpclmul")
-      endif()
-      CHECK_C_COMPILER_FLAG(-msse4.1 HAVE_INTEL_SSE4_1)
-      if(HAVE_INTEL_SSE4_1)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.1")
-      endif()
-      CHECK_C_COMPILER_FLAG(-msse4.2 HAVE_INTEL_SSE4_2)
-      if(HAVE_INTEL_SSE4_2)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.2")
-      endif()
     endif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
   endif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686|amd64|x86_64|AMD64")
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)64le")
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<div class='path'>path: <a href='/guix/log/?id=a8f53d544b00ba80f98c1c65e3cb67ce9110ae93'>root</a>/<a href='/guix/log/gnu?id=a8f53d544b00ba80f98c1c65e3cb67ce9110ae93'>gnu</a>/<a href='/guix/log/gnu/services?id=a8f53d544b00ba80f98c1c65e3cb67ce9110ae93'>services</a>/<a href='/guix/log/gnu/services/version-control.scm?id=a8f53d544b00ba80f98c1c65e3cb67ce9110ae93'>version-control.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/version-control.scm?id=a8f53d544b00ba80f98c1c65e3cb67ce9110ae93&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-11-30 01:08:55 +0100'>2021-11-30</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=892f1b7273d57b25940700877a02618fe826cc08'>services: Accept &lt;inferior-package&gt;s in lieu of &lt;package&gt;s.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/authentication.scm (fprintd-configuration)
(nslcd-configuration): Substitute file-like objects for package ones.
* gnu/services/cgit.scm (cgit-configuration, opaque-cgit-configuration):
Likewise.
* gnu/services/cups.scm (package-list?, cups-configuration): Likewise.
* gnu/services/dns.scm (verify-knot-configuration)
(ddclient-configuration): Likewise.
* gnu/services/docker.scm (docker-configuration): Likewise.
* gnu/services/file-sharing.scm (transmission-daemon-configuration): Likewise.
* gnu/services/getmail.scm (getmail-configuration): Likewise.
* gnu/services/mail.scm (dovecot-configuration)
(opaque-dovecot-configuration): Likewise.
* gnu/services/messaging.scm (prosody-configuration)
(opaque-prosody-configuration): Likewise.
* gnu/services/monitoring.scm (zabbix-server-configuration)
(zabbix-agent-configuration): Likewise.
* gnu/services/networking.scm (opendht-configuration): Likewise.
* gnu/services/pm.scm (tlp-configuration): Likewise.
* gnu/services/telephony.scm (jami-configuration): Likewise.
* gnu/services/virtualization.scm (libvirt-configuration)
(qemu-guest-agent-configuration): Likewise.
* gnu/services/vpn.scm (openvpn-client-configuration): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-02 22:56:55 +0200'>2021-09-02</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=c60daa8e9dfa5f641ecb5f4f3a9135e27b58d2d7'>gnu: version-control: Add gitile service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/version-control.scm (gitile-service-type): New variable.
* doc/guix.texi (Version Control Services): Document it.
* gnu/tests/version-control.scm (%test-gitile): New variable.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2021-09-02 22:56:44 +0200'>2021-09-02</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=cc16103861b26836908a7d16e0751739a0e20da2'>gnu: gitolite: Add unsafe-pattern configuration option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/version-control.scm (gitolite-rc-file): Add
unsafe-pattern field.
(gitolite-rc-file-compiler): Write it.
* doc/guix.texi (Version Control Services): Document it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2021-04-10 14:11:26 +0200'>2021-04-10</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=d2f2c09d273a25e99437305537f254a048281464'>services: git-daemon: Fix typo in docstring.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/version-control.scm (git-daemon-service): Fix docstring
typo.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-05 19:41:23 +0200'>2020-10-05</span></td><td><a href='/guix/commit/gnu/services/version-control.scm?id=4e3ed9bad9ed5758cdee6e636805f65e9ab710eb'>services: gitolite: Install the rc file as gitolite's user.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/version-control.scm (gitolite-activation): Install the rc
file as gitolite's user.
</span></span></td><td>Julien Lepiller</td></tr>