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and and
<varname>NOT_FOR_ARCHS_REASON_<replaceable>ARCH</replaceable></varname>.</para> <varname>NOT_FOR_ARCHS_REASON_<replaceable>ARCH</replaceable></varname>.</para>
</listitem> </listitem>
<listitem>
<para>Futher shorthands are available (cf.
<link xlink:href="https://svnweb.freebsd.org/ports/head/Mk/bsd.port.mk?view=markup">bsd.port.mk</link>):</para>
<programlisting>IGNORE_i386= does not run on 32-bit architectures</programlisting>
<programlisting>BROKEN_powerpc64= not ported to powerpc64 yet</programlisting>
</listitem>
</itemizedlist> </itemizedlist>
</sect2> </sect2>
<sect2 xml:id="dads-wordsize">
<title>Wordsize Considerations</title>
<itemizedlist>
<listitem>
<para>Some ports are affected by wordize differences
between the various architectures.</para>
<para>Here are some examples of usage:</para>
<programlisting># modify CXXFLAGS on 32-bit archs
.if ${ARCH} == armv6 || ${ARCH} == armv7 || ${ARCH} == i386 || ${ARCH} == mips || ${ARCH} == powerpc || ${ARCH} == powerpcspe
CXXFLAGS+= ...
.endif</programlisting>
<programlisting># modify LDFLAGS on 64-bit archs
.if ${ARCH} == aarch64 || ${ARCH} == amd64 || ${ARCH} == mips64 || ${ARCH} == powerpc64 || ${ARCH} == sparc64 || ${ARCH} == riscv64
LDFLAGS+= ...
.endif</programlisting>
<para>The latter may be done more succinctly and robustly as:</para>
<programlisting>.if ${ARCH:M*64*}</programlisting>
</listitem>
</itemizedlist>
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Unless I am mistaken, this is not valid make(1) code. It should probably be :M*64*. Same below.

mat: Unless I am mistaken, this is not valid make(1) code. It should probably be `:M*64*`. Same…
</sect2>
<sect2 xml:id="dads-arch-i386"> <sect2 xml:id="dads-arch-i386">
<title>i386-Specific Considerations</title>
<itemizedlist> <itemizedlist>
<listitem> <listitem>
<para>If a port fetches i386 binaries and installs them, <para>If a port fetches i386 binaries and installs them,
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