2 # Setup variables for the compiler
4 # COMPILER_TYPE is the major type of compiler. Currently gcc and clang support
5 # automatic detection. Other compiler types can be shoe-horned in, but require
6 # explicit setting of the compiler type. The compiler type can also be set
7 # explicitly if, say, you install gcc as clang...
9 # COMPILER_VERSION is a numeric constant equal to:
10 # major * 10000 + minor * 100 + tiny
11 # It too can be overridden on the command line. When testing it, be sure to
12 # make sure that you are limiting the test to a specific compiler. Testing
13 # against 30300 for gcc likely isn't what you wanted (since versions of gcc
14 # prior to 4.2 likely have no prayer of working).
16 # COMPILER_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value.
18 # COMPILER_FEATURES will contain one or more of the following, based on
19 # compiler support for that feature:
21 # - c++17: supports full (or nearly full) C++17 programming environment.
22 # - c++14: supports full (or nearly full) C++14 programming environment.
23 # - c++11: supports full (or nearly full) C++11 programming environment.
24 # - retpoline: supports the retpoline speculative execution vulnerability
26 # - init-all: supports stack variable initialization.
27 # - aarch64-sha512: supports the AArch64 sha512 intrinsic functions.
29 # When bootstrapping on macOS, 'apple-clang' will be set in COMPILER_FEATURES
30 # to differentiate Apple's version of Clang. Apple Clang uses a different
31 # versioning scheme and may not support the same -W/-Wno warning flags. For a
32 # mapping of Apple Clang versions to upstream clang versions see
33 # https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_12.x_(since_Free_On-Device_Development)
35 # These variables with an X_ prefix will also be provided if XCC is set.
37 # This file may be included multiple times, but only has effect the first time.
40 .if !target(__<bsd.compiler.mk>__)
41 __<bsd.compiler.mk>__:
43 .include <bsd.opts.mk>
45 .if defined(_NO_INCLUDE_COMPILERMK)
46 # If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj
47 # and might not have a valid compiler in $PATH yet. In this case just set the
48 # variables that are expected by the other .mk files and return
53 COMPILER_FEATURES=none
55 # command = /usr/local/bin/ccache cc ...
56 # wrapper = /usr/local/libexec/ccache/cc ...
57 CCACHE_BUILD_TYPE?= command
58 # Handle ccache after CC is determined, but not if CC/CXX are already
59 # overridden with a manual setup.
60 .if ${MK_CCACHE_BUILD:Uno} == "yes" && \
61 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \
62 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "")
63 # CC is always prepended with the ccache wrapper rather than modifying
64 # PATH since it is more clear that ccache is used and avoids wasting time
65 # for mkdep/linking/asm builds.
66 LOCALBASE?= /usr/local
67 CCACHE_PKG_PREFIX?= ${LOCALBASE}
68 CCACHE_WRAPPER_PATH?= ${CCACHE_PKG_PREFIX}/libexec/ccache
69 CCACHE_BIN?= ${CCACHE_PKG_PREFIX}/bin/ccache
70 .if exists(${CCACHE_BIN})
71 # Export to ensure sub-makes can filter it out for mkdep/linking and
72 # to chain down into kernel build which won't include this file.
74 # Expand and export some variables so they may be based on make vars.
75 # This allows doing something like the following in the environment:
76 # CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj'
77 .for var in CCACHE_LOGFILE CCACHE_BASEDIR
83 # Handle bootstrapped compiler changes properly by hashing their content
84 # rather than checking mtime. For external compilers it should be safe
85 # to use the more optimal mtime check.
86 # XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot>
87 .if ${CC:N${CCACHE_BIN}:[1]:M/*} == ""
88 CCACHE_COMPILERCHECK?= content
90 CCACHE_COMPILERCHECK?= mtime
92 .export CCACHE_COMPILERCHECK
93 # Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler.
94 .if !empty(CCACHE_PATH)
98 .if ${CCACHE_BUILD_TYPE} == "command"
99 # Remove ccache from the PATH to prevent double calls and wasted CPP/LD time.
100 PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
101 # Override various toolchain vars.
102 .for var in CC CXX HOST_CC HOST_CXX
103 .if defined(${var}) && ${${var}:M${CCACHE_BIN}} == ""
104 ${var}:= ${CCACHE_BIN} ${${var}}
108 # Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH}
109 PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
110 PATH:= ${CCACHE_WRAPPER_PATH}:${PATH}
111 CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}:
112 .endif # ${CCACHE_BUILD_TYPE} == "command"
113 # GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache.
114 # The port enables it due to ccache passing preprocessed C to clang
115 # which fails with -Wparentheses-equality, -Wtautological-compare, and
116 # -Wself-assign on macro-expanded lines.
117 .if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc"
119 .export CCACHE_NOCPP2
121 # Canonicalize CCACHE_DIR for meta mode usage.
122 .if !defined(CCACHE_DIR)
123 CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}'
126 .if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR})
127 CCACHE_DIR:= ${CCACHE_DIR:tA}
128 .MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR}
131 # ccache doesn't affect build output so let it slide for meta mode
133 .MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN}
134 ccache-print-options: .PHONY
136 .endif # exists(${CCACHE_BIN})
137 .endif # ${MK_CCACHE_BUILD} == "yes"
139 _cc_vars=CC $${_empty_var_}
140 .if !empty(_WANT_TOOLCHAIN_CROSS_VARS)
141 # Only the toplevel makefile needs to compute the X_COMPILER_* variables.
142 # Skipping the computation of the unused X_COMPILER_* in the subdirectory
143 # makefiles can save a noticeable amount of time when walking the whole source
144 # tree (e.g. during make includes, etc.).
148 .for cc X_ in ${_cc_vars}
149 .if ${cc} == "CC" || !empty(XCC)
150 # Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
151 # The value is only used/exported for the same environment that impacts
152 # CC and COMPILER_* settings here.
153 _exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \
154 ${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR
155 ${X_}_cc_hash= ${${cc}}${MACHINE}${PATH}
156 ${X_}_cc_hash:= ${${X_}_cc_hash:hash}
157 # Only import if none of the vars are set differently somehow else.
159 .for var in ${_exported_vars}
160 .if defined(${var}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}})
161 .if defined(${var}__${${X_}_ld_hash})
162 .info Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}}
167 .if ${_can_export} == yes
168 .for var in ${_exported_vars}
169 .if defined(${var}__${${X_}_cc_hash})
170 ${var}= ${${var}__${${X_}_cc_hash}}
175 .if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
176 .if ${MACHINE} == "common"
177 # common is a pseudo machine for architecture independent
178 # generated files - thus there is no compiler.
179 ${X_}COMPILER_TYPE= none
180 ${X_}COMPILER_VERSION= 0
181 ${X_}COMPILER_FREEBSD_VERSION= 0
182 .elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION)
183 _v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0
185 .if !defined(${X_}COMPILER_TYPE)
186 . if ${${cc}:T:M*gcc*}
187 ${X_}COMPILER_TYPE:= gcc
188 . elif ${${cc}:T:M*clang*}
189 ${X_}COMPILER_TYPE:= clang
191 ${X_}COMPILER_TYPE:= gcc
192 . elif ${_v:M\(GCC\)} || ${_v:M*GNU}
193 ${X_}COMPILER_TYPE:= gcc
194 . elif ${_v:Mclang} || ${_v:M(clang-*.*.*)}
195 ${X_}COMPILER_TYPE:= clang
197 # With GCC, cc --version prints "cc $VERSION ($PKGVERSION)", so if a
198 # distribution overrides the default GCC PKGVERSION it is not identified.
199 # However, its -v output always says "gcc version" in it, so fall back on that.
200 _gcc_version!= ${${cc}:N${CCACHE_BIN}} -v 2>&1 | grep "gcc version"
201 . if !empty(_gcc_version)
202 ${X_}COMPILER_TYPE:= gcc
204 .error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE.
209 .if !defined(${X_}COMPILER_VERSION)
210 ${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
212 # Detect apple clang when bootstrapping to select appropriate warning flags.
213 .if !defined(${X_}COMPILER_FEATURES) && ${_v:[*]:M*Apple clang version*}
214 ${X_}COMPILER_FEATURES= apple-clang
218 .if !defined(${X_}COMPILER_FREEBSD_VERSION)
219 ${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p'
220 # If we get a literal "__FreeBSD_cc_version" back then the compiler
221 # is a non-FreeBSD build that doesn't support it or some other error
223 .if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version"
224 ${X_}COMPILER_FREEBSD_VERSION= unknown
228 .if !defined(${X_}COMPILER_RESOURCE_DIR)
229 ${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown
232 ${X_}COMPILER_FEATURES+= c++11 c++14
233 .if ${${X_}COMPILER_TYPE} == "clang" || \
234 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000)
235 ${X_}COMPILER_FEATURES+= c++17
237 .if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000) || \
238 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 100100)
239 ${X_}COMPILER_FEATURES+= c++20
241 .if ${${X_}COMPILER_TYPE} == "clang" || \
242 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 120000)
243 ${X_}COMPILER_FEATURES+= init-all
245 .if ${${X_}COMPILER_TYPE} == "clang"
246 ${X_}COMPILER_FEATURES+= retpoline
247 # PR257638 lld fails with BE compressed debug. Fixed in main but external tool
248 # chains will initially not have the fix. For now limit the feature to LE
250 # When compiling bootstrap tools on non-FreeBSD, the various MACHINE variables
251 # for the host can be missing or not match FreeBSD's naming (e.g. Linux/amd64
252 # reports as MACHINE=x86_64 MACHINE_ARCH=x86_64), causing TARGET_ENDIANNESS to
253 # be undefined; be conservative and default to off until we turn this on by
254 # default everywhere.
255 .include <bsd.endian.mk>
256 .if (${.MAKE.OS} == "FreeBSD" || defined(TARGET_ENDIANNESS)) && \
257 ${TARGET_ENDIANNESS} == "1234"
258 ${X_}COMPILER_FEATURES+= compressed-debug
261 .if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \
262 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100)
263 ${X_}COMPILER_FEATURES+= fileprefixmap
266 .if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 130000) || \
267 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 90000)
268 # AArch64 sha512 intrinsics are supported (and have been tested) in
269 # clang 13 and gcc 9.
270 ${X_}COMPILER_FEATURES+= aarch64-sha512
275 X_COMPILER_TYPE= ${COMPILER_TYPE}
276 X_COMPILER_VERSION= ${COMPILER_VERSION}
277 X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION}
278 X_COMPILER_FEATURES= ${COMPILER_FEATURES}
279 X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR}
280 .endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
282 # Export the values so sub-makes don't have to look them up again, using the
283 # hash key computed above.
284 .for var in ${_exported_vars}
285 ${var}__${${X_}_cc_hash}:= ${${var}}
286 .export-env ${var}__${${X_}_cc_hash}
287 .undef ${var}__${${X_}_cc_hash}
290 .endif # ${cc} == "CC" || !empty(XCC)
291 .endfor # .for cc in CC XCC
293 .if !defined(_NO_INCLUDE_LINKERMK)
294 .include <bsd.linker.mk>
296 .endif # defined(_NO_INCLUDE_COMPILERMK)
297 .endif # !target(__<bsd.compiler.mk>__)