[PATCH 5/6] Add support for the Hurd in ./configure

[Joan Lledó]

From: Joan Lledó <jlle...@member.fsf.org>

It tests for dependencies and defines the proper variables for config.h
---
 configure | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index e9c08f18..201ce366 100755
--- a/configure
+++ b/configure
@@ -251,6 +251,7 @@ if [ -z "$OS" ]; then
        esac
        case "$REST" in
        gnu/kfreebsd*)          OS="kfreebsd"; VENDOR= ;;
+       *gnu)             OS="gnu"; VENDOR= ;;
        esac
        # Special case
        case "$OS" in
@@ -508,6 +509,12 @@ solaris*|sunos*)
        echo "DHCPCD_SRCS+=     if-sun.c" >>$CONFIG_MK
        echo "LDADD+=           -ldlpi -lkstat" >>$CONFIG_MK
        ;;
+hurd*)
+  echo "CSTD=gnu99" >>$CONFIG_MK
+  echo "CPPFLAGS+=     -D_GNU_SOURCE" >>$CONFIG_MK
+  echo "DHCPCD_SRCS+=  if-pcap.c if-hurd.c" >>$CONFIG_MK
+  echo "#define PATH_MAX 4096" >>$CONFIG_H
+;;
 *)
        echo "DHCPCD_SRCS+=     if-bsd.c" >>$CONFIG_MK
        ;;
@@ -542,6 +549,14 @@ if [ -z "$INET" ] || [ "$INET" = yes ]; then
                echo "DHCPCD_SRCS+=     ipv4ll.c" >>$CONFIG_MK
        fi
 fi
+
+if [ -z "$INET6" ]; then
+       # Support for IPv6 in dhcpcd still not tested in hte Hurd
+       case "$OS" in
+       hurd*)  INET6=no; DHCP6=no;;
+       esac
+fi
+
 if [ -z "$INET6" ] || [ "$INET6" = yes ]; then
        echo "Enabling INET6 support"
        echo "CPPFLAGS+=        -DINET6" >>$CONFIG_MK
@@ -560,8 +575,9 @@ fi
 
 if [ -z "$PRIVSEP" ]; then
        # privilege separation works fine .... except on Solaris
+       # Not tested in the Hurd yet.
        case "$OS" in
-       solaris*|sunos*)        PRIVSEP=no;;
+       solaris*|sunos*|hurd*)  PRIVSEP=no;;
        *)                      PRIVSEP=yes;;
        esac
 fi
@@ -606,6 +622,7 @@ if [ "$PRIVSEP" = yes ]; then
                         fi
                         ;;
        solaris*|sunos*) echo "PRIVSEP_SRCS+=   privsep-sun.c" >>$CONFIG_MK;;
+  hurd*) ;;
        *)               echo "PRIVSEP_SRCS+=   privsep-bsd.c" >>$CONFIG_MK;;
        esac
 else
@@ -1670,6 +1687,36 @@ EOF
        $abort && exit 1
 fi
 
+# Check for Hurd dependencies if OS is hurd
+abort=false
+if [ "$OS" = "hurd" ]; then
+  # Check for libpcap
+  printf "Testing for libpcap ... "
+  if $PKG_CONFIG --exists libpcap 2>/dev/null; then
+    PCAP_CFLAGS=$($PKG_CONFIG --cflags libpcap 2>/dev/null)
+    PCAP_LIBS=$($PKG_CONFIG --libs libpcap 2>/dev/null)
+    echo "yes"
+    echo "CFLAGS+= $PCAP_CFLAGS" >>$CONFIG_MK
+    echo "LDADD+= $PCAP_LIBS" >>$CONFIG_MK
+  else
+    # Check with -lpcap if pkg-config fails
+    cat >_pcap.c <<EOF
+#include <pcap/pcap.h>
+int main(void) { return pcap_lib_version() != NULL; }
+EOF
+    if $XCC _pcap.c -o _pcap -lpcap 2>&3; then
+      echo "yes"
+      echo "LDADD+= -lpcap" >>$CONFIG_MK
+    else
+      echo "no"
+      echo "libpcap is required for Hurd support" >&2
+      abort=true
+    fi
+    rm -f _pcap.c _pcap
+    $abort && exit 1
+  fi
+fi
+
 # Transform for a make file
 SERVICEEXISTS=$(echo "$SERVICEEXISTS" | $SED \
        -e 's:\\:\\\\:g' \
-- 
2.50.1