[PATCH] generalize uClibc guess support

[Mike Frysinger]

Rather than copying & pasting this same logic for every target,
hoist it up to a common location so all Linux targets can use it.
---
 config.guess | 108 ++++++++++++++++++++++++++++++++---------------------------
 1 file changed, 58 insertions(+), 50 deletions(-)

diff --git a/config.guess b/config.guess
index 2055429..63f0e52 100755
--- a/config.guess
+++ b/config.guess
@@ -132,6 +132,29 @@ UNAME_RELEASE=`(uname -r) 2>/dev/null` || 
UNAME_RELEASE=unknown
 UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
 UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
 
+case "${UNAME_SYSTEM}" in
+Linux|GNU|GNU/*)
+       eval $set_cc_for_build
+       cat <<-EOF > $dummy.c
+       #include <features.h>
+       #ifdef __UCLIBC__
+       # ifdef __UCLIBC_CONFIG_VERSION__
+       LIBC=uclibc __UCLIBC_CONFIG_VERSION__
+       # else
+       LIBC=uclibc
+       # endif
+       #else
+       # ifdef __dietlibc__
+       LIBC=dietlibc
+       # else
+       LIBC=gnu
+       # endif
+       #endif
+       EOF
+       eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'`
+       ;;
+esac
+
 # Note: order is significant - the case branches are not exclusive.
 
 case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
@@ -853,21 +876,21 @@ EOF
        exit ;;
     *:GNU:*:*)
        # the GNU system
-       echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo 
${UNAME_RELEASE}|sed -e 's,/.*$,,'`
+       echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-${LIBC}`echo 
${UNAME_RELEASE}|sed -e 's,/.*$,,'`
        exit ;;
     *:GNU/*:*:*)
        # other systems with GNU libc and userland
-       echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' 
| tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu
+       echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' 
| tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-${LIBC}
        exit ;;
     i*86:Minix:*:*)
        echo ${UNAME_MACHINE}-pc-minix
        exit ;;
     aarch64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     aarch64_be:Linux:*:*)
        UNAME_MACHINE=aarch64_be
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     alpha:Linux:*:*)
        case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
@@ -880,67 +903,54 @@ EOF
          EV68*) UNAME_MACHINE=alphaev68 ;;
        esac
        objdump --private-headers /bin/sh | grep -q ld.so.1
-       if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi
-       echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC}
+       if test "$?" = 0 ; then LIBC="gnulibc1" ; fi
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     arc:Linux:*:* | arceb:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     arm*:Linux:*:*)
        eval $set_cc_for_build
        if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
            | grep -q __ARM_EABI__
        then
-           echo ${UNAME_MACHINE}-unknown-linux-gnu
+           echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        else
            if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
                | grep -q __ARM_PCS_VFP
            then
-               echo ${UNAME_MACHINE}-unknown-linux-gnueabi
+               echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabi
            else
-               echo ${UNAME_MACHINE}-unknown-linux-gnueabihf
+               echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabihf
            fi
        fi
        exit ;;
     avr32*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     cris:Linux:*:*)
-       echo ${UNAME_MACHINE}-axis-linux-gnu
+       echo ${UNAME_MACHINE}-axis-linux-${LIBC}
        exit ;;
     crisv32:Linux:*:*)
-       echo ${UNAME_MACHINE}-axis-linux-gnu
+       echo ${UNAME_MACHINE}-axis-linux-${LIBC}
        exit ;;
     frv:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     hexagon:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     i*86:Linux:*:*)
-       LIBC=gnu
-       eval $set_cc_for_build
-       sed 's/^        //' << EOF >$dummy.c
-       #ifdef __dietlibc__
-       LIBC=dietlibc
-       #endif
-       #else
-       #include <features.h>
-       #ifdef __UCLIBC__
-       LIBC=uclibc
-       #endif
-EOF
-       eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'`
-       echo "${UNAME_MACHINE}-pc-linux-${LIBC}"
+       echo ${UNAME_MACHINE}-pc-linux-${LIBC}
        exit ;;
     ia64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     m32r*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     m68*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     mips:Linux:*:* | mips64:Linux:*:*)
        eval $set_cc_for_build
@@ -959,59 +969,57 @@ EOF
        #endif
 EOF
        eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
-       test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; }
+       test x"${CPU}" != x && { echo "${CPU}-unknown-linux-${LIBC}"; exit; }
        ;;
     or1k:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     or32:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     padre:Linux:*:*)
-       echo sparc-unknown-linux-gnu
+       echo sparc-unknown-linux-${LIBC}
        exit ;;
     parisc64:Linux:*:* | hppa64:Linux:*:*)
-       echo hppa64-unknown-linux-gnu
+       echo hppa64-unknown-linux-${LIBC}
        exit ;;
     parisc:Linux:*:* | hppa:Linux:*:*)
        # Look for CPU level
        case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
-         PA7*) echo hppa1.1-unknown-linux-gnu ;;
-         PA8*) echo hppa2.0-unknown-linux-gnu ;;
-         *)    echo hppa-unknown-linux-gnu ;;
+         PA7*) echo hppa1.1-unknown-linux-${LIBC} ;;
+         PA8*) echo hppa2.0-unknown-linux-${LIBC} ;;
+         *)    echo hppa-unknown-linux-${LIBC} ;;
        esac
        exit ;;
     ppc64:Linux:*:*)
-       echo powerpc64-unknown-linux-gnu
+       echo powerpc64-unknown-linux-${LIBC}
        exit ;;
     ppc:Linux:*:*)
-       echo powerpc-unknown-linux-gnu
+       echo powerpc-unknown-linux-${LIBC}
        exit ;;
     s390:Linux:*:* | s390x:Linux:*:*)
        echo ${UNAME_MACHINE}-ibm-linux
        exit ;;
     sh64*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     sh*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     sparc:Linux:*:* | sparc64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     tile*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     vax:Linux:*:*)
-       echo ${UNAME_MACHINE}-dec-linux-gnu
+       echo ${UNAME_MACHINE}-dec-linux-${LIBC}
        exit ;;
     x86_64:Linux:*:*)
-       LIBC=gnu
-       test -r /lib/libc.so && od -An -S13 /lib/libc.so | grep -q 
__uClibc_main && LIBC=uclibc
        echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     xtensa*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-gnu
+       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
        exit ;;
     i*86:DYNIX/ptx:4*:*)
        # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
-- 
1.8.2.1