2677e7fea5
kernel modules using their old installed /usr/share/mk/bsd.*.mk files,
instead of the updated ones in their source tree. This leads to errors
like:
"sys/conf/kmod.mk", line 111: Malformed conditional (${MK_CLANG_IS_CC} == "no" && ${CC:T:Mclang} != "clang")
Obviously, these errors will go away after a "make installworld", or
alternatively, by using "make buildenv" before attempting to manually
build modules.
However, since it is apparently an expected use case to build using old
.mk files, change the way we test for clang, so it also works when the
MK_CLANG_IS_CC macro doesn't exist.
Note the conditional expressions are becoming rather unreadable now, but
I will attempt to fix that on a followup commit.
MFC after: 2 weeks
116 lines
3.6 KiB
Makefile
116 lines
3.6 KiB
Makefile
# $FreeBSD$
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#
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# This file contains common settings used for building FreeBSD
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# sources.
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# Enable various levels of compiler warning checks. These may be
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# overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS.
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# for GCC: http://gcc.gnu.org/onlinedocs/gcc-3.0.4/gcc_3.html#IDX143
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# the default is gnu99 for now
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CSTD ?= gnu99
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.if ${CSTD} == "k&r"
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CFLAGS += -traditional
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.elif ${CSTD} == "c89" || ${CSTD} == "c90"
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CFLAGS += -std=iso9899:1990
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.elif ${CSTD} == "c94" || ${CSTD} == "c95"
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CFLAGS += -std=iso9899:199409
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.elif ${CSTD} == "c99"
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CFLAGS += -std=iso9899:1999
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.else
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CFLAGS += -std=${CSTD}
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.endif
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.if !defined(NO_WARNS)
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# -pedantic is problematic because it also imposes namespace restrictions
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#CFLAGS += -pedantic
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. if defined(WARNS)
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. if ${WARNS} >= 1
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CWARNFLAGS += -Wsystem-headers
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. if !defined(NO_WERROR) && ((${CC:T:Mclang} != "clang" && (!defined(MK_CLANG_IS_CC) || ${MK_CLANG_IS_CC} == "no")) || !defined(NO_WERROR.clang))
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CWARNFLAGS += -Werror
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. endif
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. endif
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. if ${WARNS} >= 2
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CWARNFLAGS += -Wall -Wno-format-y2k
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. endif
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. if ${WARNS} >= 3
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CWARNFLAGS += -W -Wno-unused-parameter -Wstrict-prototypes\
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-Wmissing-prototypes -Wpointer-arith
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. endif
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. if ${WARNS} >= 4
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CWARNFLAGS += -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch\
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-Wshadow -Wunused-parameter
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. if !defined(NO_WCAST_ALIGN) && ((${CC:T:Mclang} != "clang" && (!defined(MK_CLANG_IS_CC) || ${MK_CLANG_IS_CC} == "no")) || !defined(NO_WCAST_ALIGN.clang))
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CWARNFLAGS += -Wcast-align
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. endif
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. endif
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# BDECFLAGS
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. if ${WARNS} >= 6
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CWARNFLAGS += -Wchar-subscripts -Winline -Wnested-externs\
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-Wredundant-decls -Wold-style-definition
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. endif
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. if ${WARNS} >= 2 && ${WARNS} <= 4
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# XXX Delete -Wuninitialized by default for now -- the compiler doesn't
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# XXX always get it right.
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CWARNFLAGS += -Wno-uninitialized
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. endif
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CWARNFLAGS += -Wno-pointer-sign
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# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
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# is set to low values, these have to be disabled explicitly.
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. if ${CC:T:Mclang} == "clang" || (defined(MK_CLANG_IS_CC) && ${MK_CLANG_IS_CC} != "no")
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. if ${WARNS} <= 3
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CWARNFLAGS += -Wno-tautological-compare -Wno-unused-value\
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-Wno-parentheses-equality -Wno-unused-function\
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-Wno-conversion
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. endif
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. if ${WARNS} <= 2
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CWARNFLAGS += -Wno-switch-enum -Wno-empty-body
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. endif
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. if ${WARNS} <= 1
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CWARNFLAGS += -Wno-parentheses
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. endif
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. if defined(NO_WARRAY_BOUNDS)
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CWARNFLAGS += -Wno-array-bounds
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. endif
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. endif
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. endif
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. if defined(FORMAT_AUDIT)
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WFORMAT = 1
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. endif
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. if defined(WFORMAT)
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. if ${WFORMAT} > 0
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#CWARNFLAGS += -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
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CWARNFLAGS += -Wformat=2 -Wno-format-extra-args
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. if !defined(NO_WERROR) && ((${CC:T:Mclang} != "clang" && (!defined(MK_CLANG_IS_CC) || ${MK_CLANG_IS_CC} == "no")) || !defined(NO_WERROR.clang))
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CWARNFLAGS += -Werror
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. endif
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. endif
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. endif
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. if defined(NO_WFORMAT) || ((${CC:T:Mclang} == "clang" || (defined(MK_CLANG_IS_CC) && ${MK_CLANG_IS_CC} != "no")) && defined(NO_WFORMAT.clang))
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CWARNFLAGS += -Wno-format
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. endif
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.endif
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.if defined(IGNORE_PRAGMA)
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CWARNFLAGS += -Wno-unknown-pragmas
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.endif
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.if ${CC:T:Mclang} == "clang" || (defined(MK_CLANG_IS_CC) && ${MK_CLANG_IS_CC} != "no")
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CLANG_NO_IAS = -no-integrated-as
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CLANG_OPT_SMALL = -mllvm -stack-alignment=8 -mllvm -inline-threshold=3 \
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-mllvm -enable-load-pre=false
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.endif
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.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
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${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
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# Don't use -Wstack-protector as it breaks world with -Werror.
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SSP_CFLAGS ?= -fstack-protector
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CFLAGS += ${SSP_CFLAGS}
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.endif
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# Allow user-specified additional warning flags
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CFLAGS += ${CWARNFLAGS}
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