3 # Setup variables for the compiler
5 # COMPILER_TYPE is the major type of compiler. Currently gcc and clang support
6 # automatic detection. Other compiler types can be shoe-horned in, but require
7 # explicit setting of the compiler type. The compiler type can also be set
8 # explicitly if, say, you install gcc as clang...
10 # COMPILER_VERSION is a numeric constant equal to:
11 # major * 10000 + minor * 100 + tiny
12 # It too can be overridden on the command line. When testing it, be sure to
13 # make sure that you are limiting the test to a specific compiler. Testing
14 # against 30300 for gcc likely isn't what you wanted (since versions of gcc
15 # prior to 4.2 likely have no prayer of working).
17 # COMPILER_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value.
19 # COMPILER_FEATURES will contain one or more of the following, based on
20 # compiler support for that feature:
22 # - c++17: supports full (or nearly full) C++17 programming environment.
23 # - c++14: supports full (or nearly full) C++14 programming environment.
24 # - c++11: supports full (or nearly full) C++11 programming environment.
25 # - retpoline: supports the retpoline speculative execution vulnerability
28 # These variables with an X_ prefix will also be provided if XCC is set.
30 # This file may be included multiple times, but only has effect the first time.
33 .if !target(__<bsd.compiler.mk>__)
34 __<bsd.compiler.mk>__:
36 .include <bsd.opts.mk>
38 .if defined(_NO_INCLUDE_COMPILERMK)
39 # If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj
40 # and might not have a valid compiler in $PATH yet. In this case just set the
41 # variables that are expected by the other .mk files and return
46 COMPILER_FEATURES=none
48 # command = /usr/local/bin/ccache cc ...
49 # wrapper = /usr/local/libexec/ccache/cc ...
50 CCACHE_BUILD_TYPE?= command
51 # Handle ccache after CC is determined, but not if CC/CXX are already
52 # overridden with a manual setup.
53 .if ${MK_CCACHE_BUILD:Uno} == "yes" && \
54 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \
55 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "")
56 # CC is always prepended with the ccache wrapper rather than modifying
57 # PATH since it is more clear that ccache is used and avoids wasting time
58 # for mkdep/linking/asm builds.
59 LOCALBASE?= /usr/local
60 CCACHE_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache
61 CCACHE_BIN?= ${LOCALBASE}/bin/ccache
62 .if exists(${CCACHE_BIN})
63 # Export to ensure sub-makes can filter it out for mkdep/linking and
64 # to chain down into kernel build which won't include this file.
66 # Expand and export some variables so they may be based on make vars.
67 # This allows doing something like the following in the environment:
68 # CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj'
69 .for var in CCACHE_LOGFILE CCACHE_BASEDIR
75 # Handle bootstrapped compiler changes properly by hashing their content
76 # rather than checking mtime. For external compilers it should be safe
77 # to use the more optimal mtime check.
78 # XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot>
79 .if ${CC:N${CCACHE_BIN}:[1]:M/*} == ""
80 CCACHE_COMPILERCHECK?= content
82 CCACHE_COMPILERCHECK?= mtime
84 .export CCACHE_COMPILERCHECK
85 # Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler.
86 .if !empty(CCACHE_PATH)
90 .if ${CCACHE_BUILD_TYPE} == "command"
91 # Remove ccache from the PATH to prevent double calls and wasted CPP/LD time.
92 PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
93 # Override various toolchain vars.
94 .for var in CC CXX HOST_CC HOST_CXX
95 .if defined(${var}) && ${${var}:M${CCACHE_BIN}} == ""
96 ${var}:= ${CCACHE_BIN} ${${var}}
100 # Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH}
101 PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
102 PATH:= ${CCACHE_WRAPPER_PATH}:${PATH}
103 CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}:
104 .endif # ${CCACHE_BUILD_TYPE} == "command"
105 # GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache.
106 # The port enables it due to ccache passing preprocessed C to clang
107 # which fails with -Wparentheses-equality, -Wtautological-compare, and
108 # -Wself-assign on macro-expanded lines.
109 .if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc"
111 .export CCACHE_NOCPP2
113 # Canonicalize CCACHE_DIR for meta mode usage.
114 .if !defined(CCACHE_DIR)
115 CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}'
118 .if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR})
119 CCACHE_DIR:= ${CCACHE_DIR:tA}
120 .MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR}
123 # ccache doesn't affect build output so let it slide for meta mode
125 .MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN}
126 ccache-print-options: .PHONY
128 .endif # exists(${CCACHE_BIN})
129 .endif # ${MK_CCACHE_BUILD} == "yes"
131 _cc_vars=CC $${_empty_var_}
132 .if !empty(_WANT_TOOLCHAIN_CROSS_VARS)
133 # Only the toplevel makefile needs to compute the X_COMPILER_* variables.
134 # Skipping the computation of the unused X_COMPILER_* in the subdirectory
135 # makefiles can save a noticeable amount of time when walking the whole source
136 # tree (e.g. during make includes, etc.).
140 .for cc X_ in ${_cc_vars}
141 .if ${cc} == "CC" || !empty(XCC)
142 # Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
143 # The value is only used/exported for the same environment that impacts
144 # CC and COMPILER_* settings here.
145 _exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \
146 ${X_}COMPILER_FREEBSD_VERSION
147 ${X_}_cc_hash= ${${cc}}${MACHINE}${PATH}
148 ${X_}_cc_hash:= ${${X_}_cc_hash:hash}
149 # Only import if none of the vars are set somehow else.
151 .for var in ${_exported_vars}
156 .if ${_can_export} == yes
157 .for var in ${_exported_vars}
158 .if defined(${var}__${${X_}_cc_hash})
159 ${var}= ${${var}__${${X_}_cc_hash}}
164 .if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
165 .if ${MACHINE} == "common"
166 # common is a pseudo machine for architecture independent
167 # generated files - thus there is no compiler.
168 ${X_}COMPILER_TYPE= none
169 ${X_}COMPILER_VERSION= 0
170 ${X_}COMPILER_FREEBSD_VERSION= 0
171 .elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION)
172 _v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0
174 .if !defined(${X_}COMPILER_TYPE)
175 . if ${${cc}:T:M*gcc*}
176 ${X_}COMPILER_TYPE:= gcc
177 . elif ${${cc}:T:M*clang*}
178 ${X_}COMPILER_TYPE:= clang
180 ${X_}COMPILER_TYPE:= gcc
181 . elif ${_v:M\(GCC\)} || ${_v:M*GNU}
182 ${X_}COMPILER_TYPE:= gcc
183 . elif ${_v:Mclang} || ${_v:M(clang-*.*.*)}
184 ${X_}COMPILER_TYPE:= clang
186 .error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE.
189 .if !defined(${X_}COMPILER_VERSION)
190 ${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
194 .if !defined(${X_}COMPILER_FREEBSD_VERSION)
195 ${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p'
196 # If we get a literal "__FreeBSD_cc_version" back then the compiler
197 # is a non-FreeBSD build that doesn't support it or some other error
199 .if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version"
200 ${X_}COMPILER_FREEBSD_VERSION= unknown
204 ${X_}COMPILER_FEATURES=
205 .if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 30300) || \
206 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 40800)
207 ${X_}COMPILER_FEATURES+= c++11
209 .if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 30400) || \
210 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 50000)
211 ${X_}COMPILER_FEATURES+= c++14
213 .if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 50000) || \
214 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000)
215 ${X_}COMPILER_FEATURES+= c++17
217 .if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 60000
218 ${X_}COMPILER_FEATURES+= retpoline
223 X_COMPILER_TYPE= ${COMPILER_TYPE}
224 X_COMPILER_VERSION= ${COMPILER_VERSION}
225 X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION}
226 X_COMPILER_FEATURES= ${COMPILER_FEATURES}
227 .endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
229 # Export the values so sub-makes don't have to look them up again, using the
230 # hash key computed above.
231 .for var in ${_exported_vars}
232 ${var}__${${X_}_cc_hash}:= ${${var}}
233 .export-env ${var}__${${X_}_cc_hash}
234 .undef ${var}__${${X_}_cc_hash}
237 .endif # ${cc} == "CC" || !empty(XCC)
238 .endfor # .for cc in CC XCC
240 .if !defined(_NO_INCLUDE_LINKERMK)
241 .include <bsd.linker.mk>
243 .endif # defined(_NO_INCLUDE_COMPILERMK)
244 .endif # !target(__<bsd.compiler.mk>__)