7zip: support building on i386

archivers/7zip/Portfile

@@ -41,9 +41,12 @@ checksums           rmd160  dcdffbdbb6fc0a624c4d2d3c601c26dc38f2007a \
 extract.mkdir       yes
 patchfiles          patch-7zip_gcc_mak.diff
 
-# https://github.com/ip7z/7zip/pull/141
+# ppc support: https://github.com/ip7z/7zip/pull/141
 patchfiles-append   patch-powerpc.patch
 
+# i386 support
+patchfiles-append   patch-i386.patch
+
 post-patch {
     reinplace "s|#include <sys/sysmacros.h>|//#include <sys/sysmacros.h>|" \
     ${worksrcpath}/CPP/7zip/Common/FileStreams.cpp \
@@ -74,6 +77,9 @@ build {
     if {${muniversal.build_arch} eq "x86_64"} {
         # file name is "x64" for x86_64
         set arch_filename x64
+    } elseif {${muniversal.build_arch} eq "i386"} {
+        # file name is "x86" for i386
+        set arch_filename x86
     } else {
         # arm64, ppc, ppc64
         set arch_filename ${muniversal.build_arch}
@@ -89,6 +95,8 @@ build {
 destroot {
     if {${muniversal.build_arch} eq "x86_64"} {
         set arch_filename x64
+    } elseif {${muniversal.build_arch} eq "i386"} {
+        set arch_filename x86
     } else {
         set arch_filename ${muniversal.build_arch}
     }

archivers/7zip/files/patch-i386.patch

@@ -0,0 +1,21 @@
+--- /dev/null
++++ CPP/7zip/cmpl_mac_x86.mak
+@@ -0,0 +1,3 @@
++include ../../var_mac_x86.mak
++include ../../warn_clang_mac.mak
++include makefile.gcc
+
+--- /dev/null
++++ CPP/7zip/var_mac_x86.mak
+@@ -0,0 +1,11 @@
++PLATFORM=x86
++O=b/m_$(PLATFORM)
++IS_X64=
++IS_X86=1
++IS_ARM64=
++CROSS_COMPILE=
++MY_ARCH=-arch i386
++USE_ASM=
++CC=$(CROSS_COMPILE)clang
++CXX=$(CROSS_COMPILE)clang++
++USE_CLANG=1