07b202a847
get rid of testing explicitly for clang (using ${CC:T:Mclang}) in
individual Makefiles.
Instead, use the following extra macros, for use with clang:
- NO_WERROR.clang (disables -Werror)
- NO_WCAST_ALIGN.clang (disables -Wcast-align)
- NO_WFORMAT.clang (disables -Wformat and friends)
- CLANG_NO_IAS (disables integrated assembler)
- CLANG_OPT_SMALL (adds flags for extra small size optimizations)
As a side effect, this enables setting CC/CXX/CPP in src.conf instead of
make.conf! For clang, use the following:
CC=clang
CXX=clang++
CPP=clang-cpp
MFC after: 2 weeks
116 lines
3.3 KiB
Makefile
116 lines
3.3 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(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(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"
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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(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(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"
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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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