title: Building cURL with the Android standalone toolchain
body: <p>I'm trying to build cURL using the Android NDK standalone toolchain, but I get this error:</p>
  
  <pre><code>tool_cb_hdr.o: In function `tool_header_cb':
  tool_cb_hdr.c:(.text+0x1cc): undefined reference to `__mb_sb_limit'
  tool_cb_hdr.c:(.text+0x1d0): undefined reference to `_CurrentRuneLocale'
  tool_formparse.o: In function `formparse':
  tool_formparse.c:(.text+0x3ec): undefined reference to `__mb_sb_limit'
  tool_formparse.c:(.text+0x3f0): undefined reference to `_CurrentRuneLocale'
  tool_getparam.o: In function `getparameter':
  tool_getparam.c:(.text+0x171c): undefined reference to `_DefaultRuneLocale'
  tool_msgs.o: In function `warnf':
  tool_msgs.c:(.text+0x110): undefined reference to `_CurrentRuneLocale'
  tool_msgs.c:(.text+0x118): undefined reference to `__mb_sb_limit'
  tool_paramhlp.o: In function `proto2num':
  tool_paramhlp.c:(.text+0x320): undefined reference to `__mb_sb_limit'
  tool_paramhlp.c:(.text+0x324): undefined reference to `_CurrentRuneLocale'
  tool_paramhlp.o: In function `str2num':
  tool_paramhlp.c:(.text+0x388): undefined reference to `_DefaultRuneLocale'
  tool_parsecfg.o: In function `parseconfig':
  tool_parsecfg.c:(.text+0x3b4): undefined reference to `__mb_sb_limit'
  tool_parsecfg.c:(.text+0x3b8): undefined reference to `_CurrentRuneLocale'
  tool_urlglob.o: In function `glob_match_url':
  tool_urlglob.c:(.text+0x23c): undefined reference to `_DefaultRuneLocale'
  t    ool_urlglob.o: In function `glob_word':
  tool_urlglob.c:(.text+0xb30): undefined reference to `__mb_sb_limit'
  tool_urlglob.c:(.text+0xb34): undefined reference to `_CurrentRuneLocale'
  tool_urlglob.c:(.text+0xb40): undefined reference to `_DefaultRuneLocale'
  collect2: ld returned 1 exit status
  </code></pre>
  
  <p>This is my environment:</p>
  
  <pre><code>export HOSTCONF=arm-eabi-linux
  export NDK=$HOME/android/android-ndk-r5-crystax-2
  export TOOLCHAIN=$HOME/android/toolchain
  export ARCH=armv7-a
  export SYSROOT=$TOOLCHAIN/sysroot
  export PATH=$PATH:$TOOLCHAIN/bin:$SYSROOT/usr/local/bin
  export CROSS_COMPILE=arm-linux-androideabi
  export CC=${CROSS_COMPILE}-gcc
  export CXX=${CROSS_COMPILE}-g++
  export AR=${CROSS_COMPILE}-ar
  export AS=${CROSS_COMPILE}-as
  export LD=${CROSS_COMPILE}-ld
  export RANLIB=${CROSS_COMPILE}-ranlib
  export NM=${CROSS_COMPILE}-nm
  export CFLAGS="-DANDROID -mandroid -fomit-frame-pointer --sysroot $SYSROOT -march=$ARCH -mfloat-abi=softfp -mfpu=vfp -mthumb"
  export CXXFLAGS="$CFLAGS"
  export LDLIBS="${NDK}/sources/crystax/libs/armeabi-v7a -lcrystax_static"
  </code></pre>
  
  <p>What might the issue be?</p>
  
  <p>I've been trying to find existing ports of cURL to Android but they all seem to use ndk-build (as opposed to the standalone toolchain) or rely on unstable parts of the API.</p>
  
  <p>Thank you.</p>