debian: fix build reproducibility problems in the rules file

The configure file needs to be run using a relative pathname so that
when $(srcdir) gets introduced into binary file, the location of the
build directory doesn't find its way into the binaries.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/debian/rules b/debian/rules
index ca016dd..157dd6c 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -294,7 +294,7 @@ ${CFGSTDSTAMP}:
        mkdir -p ${stdbuilddir}
 ifeq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
        cd ${stdbuilddir} && AWK=/usr/bin/awk \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} ${STD_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} ${STD_CONF_FLAGS} \
                ${EXTRA_CONF_FLAGS} CFLAGS="${CFLAGS}" CPPFLAGS="$(CPPFLAGS)" \
                LDFLAGS="$(LDFLAGS)" CFLAGS_SHLIB="$(CFLAGS_SHLIB)" \
                CFLAGS_STLIB="$(CFLAGS_STLIB)" \
@@ -302,7 +302,7 @@ ifeq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
                LDFLAGS_STATIC="$(LDFLAGS_STATIC)"
 else
        cd ${stdbuilddir} && AWK=/usr/bin/awk CC="${DEB_HOST_GNU_TYPE}-gcc" \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} ${STD_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} ${STD_CONF_FLAGS} \
                ${EXTRA_CONF_FLAGS} --build=$(DEB_BUILD_GNU_TYPE) \
                --host=$(DEB_HOST_GNU_TYPE) CFLAGS="${CFLAGS}" \
                CPPFLAGS="$(CPPFLAGS)" CFLAGS_SHLIB="$(CFLAGS_SHLIB)" \
@@ -316,7 +316,7 @@ endif
 ifneq ($(ismips),)
        mkdir -p ${mipsbuilddir} ${mipsbuilddir64}
        cd ${mipsbuilddir} && AWK=/usr/bin/awk \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} \
                ${MIPS_NOPIC_CONF_FLAGS} CFLAGS="${CFLAGS}" \
                CPPFLAGS="$(CPPFLAGS)" LDFLAGS="$(LDFLAGS)" \
                CFLAGS_SHLIB="$(CFLAGS_SHLIB)" \
@@ -324,7 +324,7 @@ ifneq ($(ismips),)
                LDFLAGS_SHLIB="$(LDFLAGS_SHLIB)" \
                LDFLAGS_STATIC="$(LDFLAGS_STATIC)"
        cd ${mipsbuilddir64} && AWK=/usr/bin/awk \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} \
                ${MIPS_NOPIC_CONF_FLAGS} CFLAGS="${CFLAGS}" \
                CPPFLAGS="$(CPPFLAGS)" LDFLAGS="$(LDFLAGS)" \
                CFLAGS_SHLIB="$(CFLAGS_SHLIB)" \
@@ -343,7 +343,7 @@ ${CFGBFSTAMP}:
        mkdir -p ${bfbuilddir}
 ifeq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
        cd ${bfbuilddir} && AWK=/usr/bin/awk \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} ${BF_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} ${BF_CONF_FLAGS} \
                ${EXTRA_CONF_FLAGS} CFLAGS="${CFLAGS} ${BF_CFLAGS}" \
                CPPFLAGS="$(CPPFLAGS)" LDFLAGS="$(LDFLAGS)" \
                CFLAGS_SHLIB="$(CFLAGS_SHLIB)" \
@@ -352,7 +352,7 @@ ifeq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
                LDFLAGS_STATIC="$(LDFLAGS_STATIC)"
 else
        cd ${bfbuilddir} && AWK=/usr/bin/awk CC="${DEB_HOST_GNU_TYPE}-gcc" \
-               ${topdir}/configure ${COMMON_CONF_FLAGS} ${BF_CONF_FLAGS} \
+               ../../configure ${COMMON_CONF_FLAGS} ${BF_CONF_FLAGS} \
                ${EXTRA_CONF_FLAGS} --build=$(DEB_BUILD_GNU_TYPE) \
                --host=$(DEB_HOST_GNU_TYPE) CFLAGS="${CFLAGS}" \
                CPPFLAGS="$(CPPFLAGS)" LDFLAGS="$(LDFLAGS)" \