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configure: improved usage of 'pie' mode for hardening

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Evgeny Grin (Karlson2k)
2022-04-17 18:34:17 +03:00
parent 7570030f71
commit 03c29b63e0
1 changed files with 16 additions and 19 deletions
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configure.ac
+16 -19
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@@ -313,33 +313,30 @@ AS_VAR_IF([enable_compiler_hardening],["yes"],
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac],[-fstack-protector-strong],[-fstack-protector-all],[-fstack-protector])
MHD_CHECK_ADD_CC_CFLAGS([-fstack-clash-protection -ftrivial-auto-var-init=pattern],[CFLAGS_ac])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
AS_VAR_IF([pic_mode],["no"],[],
AS_IF([test "x${enable_static}" = "xyes" && test "x${pic_mode}" != "xyes"],
[
AS_VAR_IF([enable_shared],["yes"],[],
# PIE static lib can be used within non-PIE application, but
# PIE static lib cannot be used in non-PIE shared lib. Let's assume
# that static lib will not be used in shared lib
# All "pie" flags will be used automatically by libtool only
# for static library objects.
CFLAGS="${user_CFLAGS}"
# Perform tests here with "-pie" enabled
LDFLAGS="${LDFLAGS_ac} -pie ${user_LDFLAGS}"
MHD_CHECK_ADD_CC_CFLAG([-fPIE],[CFLAGS_ac],
[
# PIE cannot be used for shared lib
# PIE static lib can be used within non-PIE application, but
# PIE static lib cannot be used in non-PIE shared lib. Let's assume
# that static lib will not be used in shared lib
CFLAGS="${user_CFLAGS}"
# Perform tests with "-pie" enabled
LDFLAGS="${LDFLAGS_ac} -pie ${user_LDFLAGS}"
MHD_CHECK_ADD_CC_CFLAG([-fPIE],[CFLAGS_ac],
MHD_APPEND_FLAG_TO_VAR([LDFLAGS_ac],[-pie])
],
[
MHD_CHECK_ADD_CC_CFLAG([-fpie],[CFLAGS_ac],
[
MHD_APPEND_FLAG_TO_VAR([LDFLAGS_ac],[-pie])
],
[
MHD_CHECK_CC_CFLAG([-fpie],[CFLAGS_ac],
[
MHD_APPEND_FLAG_TO_VAR([LDFLAGS_ac],[-pie])
]
)
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"