#
CC = @CC@
+MKDEP = @MKDEP@
PROG = tcpdump
CCOPT = @V_CCOPT@
INCLS = -I. @V_INCLS@
INSTALL_DATA = @INSTALL_DATA@
RANLIB = @RANLIB@
+DEPENDENCY_CFLAG = @DEPENDENCY_CFLAG@
+
# Explicitly define compilation rule since SunOS 4's make doesn't like gcc.
# Also, gcc does not remove the .o before forking 'as', which can be a
# problem if you don't own the file but can write to the directory.
echo $(TEST_DIST)
depend: $(GENSRC)
- ${srcdir}/mkdep -c $(CC) $(DEFS) $(INCLS) $(SRC)
+ $(MKDEP) -c $(CC) -m $(DEPENDENCY_CFLAG) $(DEFS) $(INCLS) $(SRC)
])
])
+dnl
+dnl Check whether the compiler supports an option to generate
+dnl Makefile-style dependency lines
+dnl
+dnl GCC uses -M for this. Non-GCC compilers that support this
+dnl use a variety of flags, including but not limited to -M.
+dnl
+dnl We test whether the flag in question is supported, as older
+dnl versions of compilers might not support it.
+dnl
+dnl We don't try all the possible flags, just in case some flag means
+dnl "generate dependencies" on one compiler but means something else
+dnl on another compiler.
+dnl
+dnl Most compilers that support this send the output to the standard
+dnl output by default. IBM's XLC, however, supports -M but sends
+dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout
+dnl to work around that, so we don't bother with XLC.
+dnl
+AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT,
+ [
+ AC_MSG_CHECKING([whether the compiler supports generating dependencies])
+ if test "$GCC" = yes ; then
+ #
+ # GCC, or a compiler deemed to be GCC by AC_PROG_CC (even
+ # though it's not); we assume that, in this case, the flag
+ # would be -M.
+ #
+ ac_lbl_dependency_flag="-M"
+ else
+ #
+ # Not GCC or a compiler deemed to be GCC; what platform is
+ # this? (We're assuming that if the compiler isn't GCC
+ # it's the compiler from the vendor of the OS; that won't
+ # necessarily be true for x86 platforms, where it might be
+ # the Intel C compiler.)
+ #
+ case "$host_os" in
+
+ irix*|osf*|darwin*)
+ #
+ # MIPS C for IRIX, DEC C, and clang all use -M.
+ #
+ ac_lbl_dependency_flag="-M"
+ ;;
+
+ solaris*)
+ #
+ # Sun C uses -xM.
+ #
+ ac_lbl_dependency_flag="-xM"
+ ;;
+
+ hpux*)
+ #
+ # HP's older C compilers don't support this.
+ # HP's newer C compilers support this with
+ # either +M or +Make; the older compilers
+ # interpret +M as something completely
+ # different, so we use +Make so we don't
+ # think it works with the older compilers.
+ #
+ ac_lbl_dependency_flag="+Make"
+ ;;
+
+ *)
+ #
+ # Not one of the above; assume no support for
+ # generating dependencies.
+ #
+ ac_lbl_dependency_flag=""
+ ;;
+ esac
+ fi
+
+ #
+ # Is ac_lbl_dependency_flag defined and, if so, does the compiler
+ # complain about it?
+ #
+ # Note: clang doesn't seem to exit with an error status when handed
+ # an unknown non-warning error, even if you pass it
+ # -Werror=unknown-warning-option. However, it always supports
+ # -M, so the fact that this test always succeeds with clang
+ # isn't an issue.
+ #
+ if test ! -z "$ac_lbl_dependency_flag"; then
+ AC_LANG_CONFTEST(
+ [AC_LANG_SOURCE([[int main(void) { return 0; }]])])
+ echo "$CC" $ac_lbl_dependency_flag conftest.c >&5
+ if "$CC" $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1; then
+ AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag])
+ DEPENDENCY_CFLAG="$ac_lbl_dependency_flag"
+ MKDEP='${srcdir}/mkdep'
+ else
+ AC_MSG_RESULT([no])
+ #
+ # We can't run mkdep, so have "make depend" do
+ # nothing.
+ #
+ MKDEP=:
+ fi
+ rm -rf conftest*
+ else
+ AC_MSG_RESULT([no])
+ #
+ # We can't run mkdep, so have "make depend" do
+ # nothing.
+ #
+ MKDEP=:
+ fi
+ AC_SUBST(DEPENDENCY_CFLAG MKDEP)
+ ])
+
#
# Try compiling a sample of the type of code that appears in
# gencode.c with "inline", "__inline__", and "__inline".
AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-arith)
AC_LBL_CHECK_COMPILER_OPT($1, -W)
fi
+ AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT()
if test "$GCC" = yes ; then
if test "${LBL_CFLAGS+set}" != set; then
if test "$ac_cv_prog_cc_g" = yes ; then
LIBOBJS
PCAP_CONFIG
RANLIB
+DEPENDENCY_CFLAG MKDEP
V_CCOPT
V_DEFS
V_GROUP
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
+
+ { echo "$as_me:$LINENO: checking whether the compiler supports generating dependencies" >&5
+echo $ECHO_N "checking whether the compiler supports generating dependencies... $ECHO_C" >&6; }
+ if test "$GCC" = yes ; then
+ #
+ # GCC, or a compiler deemed to be GCC by AC_PROG_CC (even
+ # though it's not); we assume that, in this case, the flag
+ # would be -M.
+ #
+ ac_lbl_dependency_flag="-M"
+ else
+ #
+ # Not GCC or a compiler deemed to be GCC; what platform is
+ # this? (We're assuming that if the compiler isn't GCC
+ # it's the compiler from the vendor of the OS; that won't
+ # necessarily be true for x86 platforms, where it might be
+ # the Intel C compiler.)
+ #
+ case "$host_os" in
+
+ irix*|osf*|darwin*)
+ #
+ # MIPS C for IRIX, DEC C, and clang all use -M.
+ #
+ ac_lbl_dependency_flag="-M"
+ ;;
+
+ solaris*)
+ #
+ # Sun C uses -xM.
+ #
+ ac_lbl_dependency_flag="-xM"
+ ;;
+
+ hpux*)
+ #
+ # HP's older C compilers don't support this.
+ # HP's newer C compilers support this with
+ # either +M or +Make; the older compilers
+ # interpret +M as something completely
+ # different, so we use +Make so we don't
+ # think it works with the older compilers.
+ #
+ ac_lbl_dependency_flag="+Make"
+ ;;
+
+ *)
+ #
+ # Not one of the above; assume no support for
+ # generating dependencies.
+ #
+ ac_lbl_dependency_flag=""
+ ;;
+ esac
+ fi
+
+ #
+ # Is ac_lbl_dependency_flag defined and, if so, does the compiler
+ # complain about it?
+ #
+ # Note: clang doesn't seem to exit with an error status when handed
+ # an unknown non-warning error, even if you pass it
+ # -Werror=unknown-warning-option. However, it always supports
+ # -M, so the fact that this test always succeeds with clang
+ # isn't an issue.
+ #
+ if test ! -z "$ac_lbl_dependency_flag"; then
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+int main(void) { return 0; }
+_ACEOF
+ echo "$CC" $ac_lbl_dependency_flag conftest.c >&5
+ if "$CC" $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1; then
+ { echo "$as_me:$LINENO: result: yes, with $ac_lbl_dependency_flag" >&5
+echo "${ECHO_T}yes, with $ac_lbl_dependency_flag" >&6; }
+ DEPENDENCY_CFLAG="$ac_lbl_dependency_flag"
+ MKDEP='${srcdir}/mkdep'
+ else
+ { echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+ #
+ # We can't run mkdep, so have "make depend" do
+ # nothing.
+ #
+ MKDEP=:
+ fi
+ rm -rf conftest*
+ else
+ { echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+ #
+ # We can't run mkdep, so have "make depend" do
+ # nothing.
+ #
+ MKDEP=:
+ fi
+
+
if test "$GCC" = yes ; then
if test "${LBL_CFLAGS+set}" != set; then
if test "$ac_cv_prog_cc_g" = yes ; then
LIBOBJS!$LIBOBJS$ac_delim
PCAP_CONFIG!$PCAP_CONFIG$ac_delim
RANLIB!$RANLIB$ac_delim
+DEPENDENCY_CFLAG!$DEPENDENCY_CFLAG$ac_delim
+MKDEP!$MKDEP$ac_delim
V_CCOPT!$V_CCOPT$ac_delim
V_DEFS!$V_DEFS$ac_delim
V_GROUP!$V_GROUP$ac_delim
LTLIBOBJS!$LTLIBOBJS$ac_delim
_ACEOF
- if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 71; then
+ if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 73; then
break
elif $ac_last_try; then
{ { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
MAKE=Makefile # default makefile name is "Makefile"
CC=cc # default C compiler is "cc"
+DEPENDENCY_CFLAG=-M # default dependency-generation flag is -M
while :
do case "$1" in
MAKE=$2
shift; shift ;;
+ # -m allows you to specify the dependency-generation flag
+ -m)
+ DEPENDENCY_CFLAG=$2
+ shift; shift ;;
+
# the -p flag produces "program: program.c" style dependencies
# so .o's don't get produced
-p)
done
if [ $# = 0 ] ; then
- echo 'usage: mkdep [-p] [-c cc] [-f makefile] [flags] file ...'
+ echo 'usage: mkdep [-p] [-c cc] [-f makefile] [-m dependency-cflag] [flags] file ...'
exit 1
fi
# sed -e 's/:[^"]*"\([^"]*\)".*/: \1/' -e 's/\.c/.o/' |
# XXX this doesn't work with things like "-DDECLWAITSTATUS=union\ wait"
-$CC -M $* |
+$CC $DEPENDENCY_CFLAG $* |
sed "
s; \./; ;g
$SED" |
projects / tcpdump / commitdiff
