c8edd05426
If MK_DEBUG_FILES=no then the Clang link rule has clang as .TARGET,
rather than clang.full, causing the implicit ${CFLAGS.${.TARGET:T}} to
be CFLAGS.clang, and thus pull in flags intended for when your compiler
is Clang, not when linking Clang itself. This doesn't matter if your
compiler is in fact Clang, but it breaks using GCC as, for example,
bsd.sys.mk adds -Qunused-arguments to CFLAGS.clang. This is seen when
trying to build a bootstrap toolchain on Linux where GCC is the system
compiler.
Thus, introduce a new internal NO_TARGET_FLAGS variable that is set by
Clang to disable the addition of these implicit flags. This is a bigger
hammer than necessary, as flags for .o files would be safe, but that is
not needed for Clang.
Note that the same problem does not arise for LDFLAGS when building LLD
with BFD, since our build produces a program called ld.lld, not plain
lld (unlike upstream, where ld.lld is a symlink to lld so they can
support multiple different flavours in one binary).
Suggested by: sjg
Fixes: 31ba4ce889 ("Allow bootstrapping llvm-tblgen on macOS and Linux")
MFC after: 1 week
Reviewed by: dim, imp, emaste
Differential Revision: https://reviews.freebsd.org/D31532
448 lines
14 KiB
Makefile
448 lines
14 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 MK_WARNS=no.
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# for GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
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# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html
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.include <bsd.compiler.mk>
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# the default is gnu99 for now
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CSTD?= gnu99
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.if ${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 ${CSTD} == "c99"
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CFLAGS+= -std=iso9899:1999
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.else # CSTD
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CFLAGS+= -std=${CSTD}
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.endif # CSTD
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.if !empty(CXXSTD)
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CXXFLAGS+= -std=${CXXSTD}
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.endif
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# This gives the Makefile we're evaluating at the top-level a chance to set
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# WARNS. If it doesn't do so, we may freely pull a DEFAULTWARNS if it's set
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# and use that. This allows us to default WARNS to 6 for src builds without
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# needing to set the default in various Makefile.inc.
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.if !defined(WARNS) && defined(DEFAULTWARNS)
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WARNS= ${DEFAULTWARNS}
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.endif
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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 ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
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CWARNFLAGS+= -Werror
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.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
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.endif # WARNS >= 1
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.if ${WARNS} >= 2
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CWARNFLAGS+= -Wall -Wno-format-y2k
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.endif # WARNS >= 2
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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 # WARNS >= 3
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.if ${WARNS} >= 4
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CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
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-Wunused-parameter
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.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
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CWARNFLAGS+= -Wcast-align
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.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
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.endif # WARNS >= 4
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.if ${WARNS} >= 6
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CWARNFLAGS+= -Wchar-subscripts -Wnested-externs -Wredundant-decls\
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-Wold-style-definition
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.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
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CWARNFLAGS.clang+= -Wmissing-variable-declarations
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.endif
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.if !defined(NO_WTHREAD_SAFETY)
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CWARNFLAGS.clang+= -Wthread-safety
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.endif
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.endif # WARNS >= 6
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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 # WARNS >=2 && WARNS <= 4
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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 ${WARNS} <= 6
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CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int
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CWARNFLAGS.clang+= -Wno-unused-const-variable
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.endif # WARNS <= 6
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.if ${WARNS} <= 3
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CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\
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-Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
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CWARNFLAGS.clang+= -Wno-unused-local-typedef
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CWARNFLAGS.clang+= -Wno-address-of-packed-member
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.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100
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CWARNFLAGS.gcc+= -Wno-address-of-packed-member
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.endif
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.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
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${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
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CWARNFLAGS.clang+= -Wno-atomic-alignment
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.endif
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.endif # WARNS <= 3
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.if ${WARNS} <= 2
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CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
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.endif # WARNS <= 2
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.if ${WARNS} <= 1
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CWARNFLAGS.clang+= -Wno-parentheses
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.endif # WARNS <= 1
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.if defined(NO_WARRAY_BOUNDS)
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CWARNFLAGS.clang+= -Wno-array-bounds
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.endif # NO_WARRAY_BOUNDS
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.if defined(NO_WMISLEADING_INDENTATION) && \
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((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \
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${COMPILER_TYPE} == "gcc")
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CWARNFLAGS+= -Wno-misleading-indentation
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.endif # NO_WMISLEADING_INDENTATION
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.endif # WARNS
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.if defined(FORMAT_AUDIT)
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WFORMAT= 1
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.endif # FORMAT_AUDIT
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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 ${WARNS} <= 3
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CWARNFLAGS.clang+= -Wno-format-nonliteral
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.endif # WARNS <= 3
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.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
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CWARNFLAGS+= -Werror
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.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
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.endif # WFORMAT > 0
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.endif # WFORMAT
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.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
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CWARNFLAGS+= -Wno-format
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.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
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# GCC
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# We should clean up warnings produced with these flags.
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# They were originally added as a quick hack to enable gcc5/6.
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# The base system requires at least GCC 6.4, but some ports
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# use this file with older compilers. Request an exprun
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# before changing these.
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.if ${COMPILER_TYPE} == "gcc"
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# GCC 5.2.0
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.if ${COMPILER_VERSION} >= 50200
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CWARNFLAGS+= -Wno-error=address \
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-Wno-error=array-bounds \
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-Wno-error=attributes \
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-Wno-error=bool-compare \
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-Wno-error=cast-align \
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-Wno-error=clobbered \
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-Wno-error=deprecated-declarations \
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-Wno-error=enum-compare \
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-Wno-error=extra \
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-Wno-error=logical-not-parentheses \
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-Wno-error=strict-aliasing \
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-Wno-error=uninitialized \
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-Wno-error=unused-but-set-variable \
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-Wno-error=unused-function \
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-Wno-error=unused-value
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.endif
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# GCC 6.1.0
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.if ${COMPILER_VERSION} >= 60100
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CWARNFLAGS+= -Wno-error=empty-body \
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-Wno-error=maybe-uninitialized \
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-Wno-error=nonnull-compare \
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-Wno-error=redundant-decls \
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-Wno-error=shift-negative-value \
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-Wno-error=tautological-compare \
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-Wno-error=unused-const-variable
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.endif
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# GCC 7.1.0
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.if ${COMPILER_VERSION} >= 70100
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CWARNFLAGS+= -Wno-error=bool-operation \
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-Wno-error=deprecated \
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-Wno-error=expansion-to-defined \
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-Wno-error=format-overflow \
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-Wno-error=format-truncation \
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-Wno-error=implicit-fallthrough \
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-Wno-error=int-in-bool-context \
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-Wno-error=memset-elt-size \
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-Wno-error=noexcept-type \
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-Wno-error=nonnull \
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-Wno-error=pointer-compare \
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-Wno-error=stringop-overflow
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.endif
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# GCC 8.1.0
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.if ${COMPILER_VERSION} >= 80100
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CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \
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-Wno-error=cast-function-type \
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-Wno-error=catch-value \
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-Wno-error=multistatement-macros \
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-Wno-error=restrict \
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-Wno-error=sizeof-pointer-memaccess \
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-Wno-error=stringop-truncation
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.endif
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# GCC's own arm_neon.h triggers various warnings
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.if ${MACHINE_CPUARCH} == "aarch64"
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CWARNFLAGS+= -Wno-system-headers
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.endif
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.endif # gcc
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# How to handle FreeBSD custom printf format specifiers.
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.if ${COMPILER_TYPE} == "clang"
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FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__
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.else
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FORMAT_EXTENSIONS= -fformat-extensions
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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 # IGNORE_PRAGMA
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# This warning is utter nonsense
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CFLAGS+= -Wno-format-zero-length
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.if ${COMPILER_TYPE} == "clang"
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# The headers provided by clang are incompatible with the FreeBSD headers.
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# If the version of clang is not one that has been patched to omit the
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# incompatible headers, we need to compile with -nobuiltininc and add the
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# resource dir to the end of the search paths. This ensures that headers such as
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# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD.
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#
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# XXX: This is a hack to support complete external installs of clang while
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# we work to synchronize our decleration guards with those in the clang tree.
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.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \
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${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING)
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CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include
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.endif
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.endif
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CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
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-mllvm -simplifycfg-dup-ret
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CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
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CFLAGS.clang+= -Qunused-arguments
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# The libc++ headers use c++11 extensions. These are normally silenced because
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# they are treated as system headers, but we explicitly disable that warning
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# suppression when building the base system to catch bugs in our headers.
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# Eventually we'll want to start building the base system C++ code as C++11,
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# but not yet.
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CXXFLAGS.clang+= -Wno-c++11-extensions
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.if ${MK_SSP} != "no"
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# Don't use -Wstack-protector as it breaks world with -Werror.
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SSP_CFLAGS?= -fstack-protector-strong
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CFLAGS+= ${SSP_CFLAGS}
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.endif # SSP
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# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
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# enabled.
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DEBUG_FILES_CFLAGS?= -g -gz=zlib
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# Allow user-specified additional warning flags, plus compiler and file
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# specific flag overrides, unless we've overridden this...
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.if ${MK_WARNS} != "no"
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CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
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CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}}
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CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}}
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CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}}
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.endif
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CFLAGS+= ${CFLAGS.${COMPILER_TYPE}}
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CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}}
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AFLAGS+= ${AFLAGS.${.IMPSRC:T}}
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AFLAGS+= ${AFLAGS.${.TARGET:T}}
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ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}}
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ACFLAGS+= ${ACFLAGS.${.TARGET:T}}
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CFLAGS+= ${CFLAGS.${.IMPSRC:T}}
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CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}}
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LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}}
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# Only allow .TARGET when not using PROGS as it has the same syntax
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# per PROG which is ambiguous with this syntax. This is only needed
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# for PROG_VARS vars.
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#
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# Some directories (currently just clang) also need to disable this since
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# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live
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# in the same namespace, meaning that, for example, GCC builds of clang pick up
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# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific
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# flags. Ideally the different sources of CFLAGS would be namespaced to avoid
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# collisions.
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.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS)
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.if ${MK_WARNS} != "no"
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CFLAGS+= ${CWARNFLAGS.${.TARGET:T}}
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.endif
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CFLAGS+= ${CFLAGS.${.TARGET:T}}
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CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}}
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LDFLAGS+= ${LDFLAGS.${.TARGET:T}}
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LDADD+= ${LDADD.${.TARGET:T}}
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LIBADD+= ${LIBADD.${.TARGET:T}}
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.endif
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.if defined(SRCTOP)
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# Prevent rebuilding during install to support read-only objdirs.
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.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
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CFLAGS+= ERROR-tried-to-rebuild-during-make-install
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.endif
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.endif
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# Please keep this if in sync with kern.mk
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.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld")
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# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld".
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.if ${COMPILER_TYPE} == "clang"
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# Note: Clang does not like relative paths for ld so we map ld.lld -> lld.
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.if ${COMPILER_VERSION} >= 120000
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LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W}
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.else
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LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W}
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.endif
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.else
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# GCC does not support an absolute path for -fuse-ld so we just print this
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# warning instead and let the user add the required symlinks.
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# However, we can avoid this warning if -B is set appropriately (e.g. for
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# CROSS_TOOLCHAIN=...-gcc).
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.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/})
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.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported
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.endif
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.endif
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.endif
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# Tell bmake not to mistake standard targets for things to be searched for
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# or expect to ever be up-to-date.
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PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
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beforelinking build build-tools buildconfig buildfiles \
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buildincludes check checkdpadd clean cleandepend cleandir \
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cleanobj configure depend distclean distribute exe \
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files html includes install installconfig installdirs \
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installfiles installincludes lint obj objlink objs objwarn \
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realinstall tags whereobj
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# we don't want ${PROG} to be PHONY
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.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
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.NOTMAIN: ${PHONY_NOTMAIN:Nall}
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.if ${MK_STAGING} != "no"
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.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean))
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_SKIP_STAGING?= yes
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.endif
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.if ${_SKIP_STAGING:Uno} == "yes"
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staging stage_libs stage_files stage_as stage_links stage_symlinks:
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.else
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# allow targets like beforeinstall to be leveraged
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DESTDIR= ${STAGE_OBJTOP}
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.export DESTDIR
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.if target(beforeinstall)
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.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
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staging: beforeinstall
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.endif
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.endif
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# normally only libs and includes are staged
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.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
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STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
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.if !empty(PROG)
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.if defined(PROGNAME)
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STAGE_AS_SETS+= prog
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STAGE_AS_${PROG}= ${PROGNAME}
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stage_as.prog: ${PROG}
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.else
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STAGE_SETS+= prog
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stage_files.prog: ${PROG}
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STAGE_TARGETS+= stage_files
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.endif
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.endif
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.endif
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.if !empty(_LIBS) && !defined(INTERNALLIB)
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.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
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STAGE_SETS+= shlib
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STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
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STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
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stage_files.shlib: ${_LIBS:M*.so.*}
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.endif
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.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
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STAGE_AS_SETS+= ldscript
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STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
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stage_as.ldscript: ${SHLIB_LINK:R}.ld
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STAGE_DIR.ldscript = ${STAGE_LIBDIR}
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STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
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NO_SHLIB_LINKS=
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.endif
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.if target(stage_files.shlib)
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stage_libs: ${_LIBS}
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.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
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stage_files.shlib: ${SHLIB_NAME}.symbols
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.endif
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.else
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stage_libs: ${_LIBS}
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.endif
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.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
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stage_libs: ${SHLIB_NAME}.symbols
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.endif
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.endif
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.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
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.if !defined(NO_BEFOREBUILD_INCLUDES)
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stage_includes: buildincludes
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beforebuild: stage_includes
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.endif
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.endif
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|
|
.for t in stage_libs stage_files stage_as
|
|
.if target($t)
|
|
STAGE_TARGETS+= $t
|
|
.endif
|
|
.endfor
|
|
|
|
.if !empty(STAGE_AS_SETS)
|
|
STAGE_TARGETS+= stage_as
|
|
.endif
|
|
|
|
.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
|
|
|
|
.if !empty(LINKS)
|
|
STAGE_TARGETS+= stage_links
|
|
.if ${MAKE_VERSION} < 20131001
|
|
stage_links.links: ${_LIBS} ${PROG}
|
|
.endif
|
|
STAGE_SETS+= links
|
|
STAGE_LINKS.links= ${LINKS}
|
|
.endif
|
|
|
|
.if !empty(SYMLINKS)
|
|
STAGE_TARGETS+= stage_symlinks
|
|
STAGE_SETS+= links
|
|
STAGE_SYMLINKS.links= ${SYMLINKS}
|
|
.endif
|
|
|
|
.endif
|
|
|
|
.include <meta.stage.mk>
|
|
.endif
|
|
.endif
|
|
|
|
.if defined(META_TARGETS)
|
|
.for _tgt in ${META_TARGETS}
|
|
.if target(${_tgt})
|
|
${_tgt}: ${META_DEPS}
|
|
.endif
|
|
.endfor
|
|
.endif
|