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add --enable-static configure argument. disable conflicting harden flags

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This commit is contained in:
Matt Johnston 2017-06-27 22:37:46 +08:00
parent 74ace058a6
commit a9a3746d09
2 changed files with 47 additions and 31 deletions
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2
Makefile.in
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@ -94,6 +94,8 @@ LDFLAGS=@LDFLAGS@
EXEEXT=@EXEEXT@
STATIC=@STATIC@
# whether we're building client, server, or both for the common objects.
# evilness so we detect 'dropbear' by itself as a word
space:= $(empty) $(empty)

76
configure.ac
View File

@ -33,6 +33,17 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT(no); CFLAGS="$OLDCFLAGS" ]
)
STATIC=0
AC_ARG_ENABLE(static,
[ --enable-static Build static binaries],
[
if test "x$enableval" = "xyes"; then
STATIC=1
AC_MSG_NOTICE(Static Build)
fi
], [])
AC_SUBST(STATIC)
hardenbuild=1
AC_ARG_ENABLE(harden,
[ --disable-harden Don't set hardened build flags],
@ -45,37 +56,40 @@ AC_ARG_ENABLE(harden,
if test "$hardenbuild" -eq 1; then
AC_MSG_NOTICE(Checking for available hardened build flags:)
# pie
OLDCFLAGS="$CFLAGS"
TESTFLAGS="-fPIE"
CFLAGS="$CFLAGS $TESTFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDCFLAGS" ]
)
OLDLDFLAGS="$LDFLAGS"
TESTFLAGS="-Wl,-pie"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[
LDFLAGS="$OLDLDFLAGS"
TESTFLAGS="-pie"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
)
]
)
# readonly elf relocation sections (relro)
OLDLDFLAGS="$LDFLAGS"
TESTFLAGS="-Wl,-z,now -Wl,-z,relro"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
)
# relocation flags don't make sense for static builds
if test "$STATIC" -ne 1; then
# pie
OLDCFLAGS="$CFLAGS"
TESTFLAGS="-fPIE"
CFLAGS="$CFLAGS $TESTFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDCFLAGS" ]
)
OLDLDFLAGS="$LDFLAGS"
TESTFLAGS="-Wl,-pie"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[
LDFLAGS="$OLDLDFLAGS"
TESTFLAGS="-pie"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
)
]
)
# readonly elf relocation sections (relro)
OLDLDFLAGS="$LDFLAGS"
TESTFLAGS="-Wl,-z,now -Wl,-z,relro"
LDFLAGS="$LDFLAGS $TESTFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_NOTICE([Setting $TESTFLAGS])],
[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
)
fi # non-static
# stack protector. -strong is good but only in gcc 4.9 or later
OLDCFLAGS="$CFLAGS"
TESTFLAGS="-fstack-protector-strong"