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| 1 #!/bin/sh | |
| 2 | |
| 3 usage () { | |
| 4 cat <<EOF | |
| 5 Usage: $0 [OPTION]... [VAR=VALUE]... [TARGET] | |
| 6 | |
| 7 To assign environment variables (e.g., CC, CFLAGS...), specify them as | |
| 8 VAR=VALUE. See below for descriptions of some of the useful variables. | |
| 9 | |
| 10 Defaults for the options are specified in brackets. | |
| 11 | |
| 12 Installation directories: | |
| 13 --prefix=PREFIX main installation prefix [/usr/local/musl] | |
| 14 --exec-prefix=EPREFIX installation prefix for executable files [PREFIX] | |
| 15 | |
| 16 Fine tuning of the installation directories: | |
| 17 --bindir=DIR user executables [EPREFIX/bin] | |
| 18 --libdir=DIR library files for the linker [PREFIX/lib] | |
| 19 --includedir=DIR include files for the C compiler [PREFIX/include] | |
| 20 --syslibdir=DIR location for the dynamic linker [/lib] | |
| 21 | |
| 22 System types: | |
| 23 --target=TARGET configure to run on target TARGET [detected] | |
| 24 --host=HOST same as --target | |
| 25 | |
| 26 Optional features: | |
| 27 --enable-optimize=... optimize listed components for speed over size [auto] | |
| 28 --enable-debug build with debugging information [disabled] | |
| 29 --enable-warnings build with recommended warnings flags [disabled] | |
| 30 --enable-visibility use global visibility options to optimize PIC [auto] | |
| 31 --enable-wrapper=... build given musl toolchain wrapper [auto] | |
| 32 --disable-shared inhibit building shared library [enabled] | |
| 33 --disable-static inhibit building static library [enabled] | |
| 34 | |
| 35 Some influential environment variables: | |
| 36 CC C compiler command [detected] | |
| 37 CFLAGS C compiler flags [-Os -pipe ...] | |
| 38 CROSS_COMPILE prefix for cross compiler and tools [none] | |
| 39 LIBCC compiler runtime library [detected] | |
| 40 | |
| 41 Use these variables to override the choices made by configure. | |
| 42 | |
| 43 EOF | |
| 44 exit 0 | |
| 45 } | |
| 46 | |
| 47 # Helper functions | |
| 48 | |
| 49 quote () { | |
| 50 tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1"
; return 0 ; } | |
| 51 $1 | |
| 52 EOF | |
| 53 printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\
([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#" | |
| 54 } | |
| 55 echo () { printf "%s\n" "$*" ; } | |
| 56 fail () { echo "$*" ; exit 1 ; } | |
| 57 fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; } | |
| 58 cmdexists () { type "$1" >/dev/null 2>&1 ; } | |
| 59 trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; } | |
| 60 | |
| 61 stripdir () { | |
| 62 while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done | |
| 63 } | |
| 64 | |
| 65 trycppif () { | |
| 66 printf "checking preprocessor condition %s... " "$1" | |
| 67 echo "typedef int x;" > "$tmpc" | |
| 68 echo "#if $1" >> "$tmpc" | |
| 69 echo "#error yes" >> "$tmpc" | |
| 70 echo "#endif" >> "$tmpc" | |
| 71 if $CC $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then | |
| 72 printf "false\n" | |
| 73 return 1 | |
| 74 else | |
| 75 printf "true\n" | |
| 76 return 0 | |
| 77 fi | |
| 78 } | |
| 79 | |
| 80 tryflag () { | |
| 81 printf "checking whether compiler accepts %s... " "$2" | |
| 82 echo "typedef int x;" > "$tmpc" | |
| 83 if $CC $CFLAGS_TRY $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then | |
| 84 printf "yes\n" | |
| 85 eval "$1=\"\${$1} \$2\"" | |
| 86 eval "$1=\${$1# }" | |
| 87 return 0 | |
| 88 else | |
| 89 printf "no\n" | |
| 90 return 1 | |
| 91 fi | |
| 92 } | |
| 93 | |
| 94 tryldflag () { | |
| 95 printf "checking whether linker accepts %s... " "$2" | |
| 96 echo "typedef int x;" > "$tmpc" | |
| 97 if $CC $LDFLAGS_TRY -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1
; then | |
| 98 printf "yes\n" | |
| 99 eval "$1=\"\${$1} \$2\"" | |
| 100 eval "$1=\${$1# }" | |
| 101 return 0 | |
| 102 else | |
| 103 printf "no\n" | |
| 104 return 1 | |
| 105 fi | |
| 106 } | |
| 107 | |
| 108 | |
| 109 | |
| 110 # Beginning of actual script | |
| 111 | |
| 112 CFLAGS_C99FSE= | |
| 113 CFLAGS_AUTO= | |
| 114 CFLAGS_MEMOPS= | |
| 115 CFLAGS_NOSSP= | |
| 116 CFLAGS_TRY= | |
| 117 LDFLAGS_AUTO= | |
| 118 LDFLAGS_TRY= | |
| 119 OPTIMIZE_GLOBS= | |
| 120 prefix=/usr/local/musl | |
| 121 exec_prefix='$(prefix)' | |
| 122 bindir='$(exec_prefix)/bin' | |
| 123 libdir='$(prefix)/lib' | |
| 124 includedir='$(prefix)/include' | |
| 125 syslibdir='/lib' | |
| 126 tools= | |
| 127 tool_libs= | |
| 128 target= | |
| 129 optimize=auto | |
| 130 debug=no | |
| 131 warnings=no | |
| 132 visibility=auto | |
| 133 shared=auto | |
| 134 static=yes | |
| 135 wrapper=auto | |
| 136 gcc_wrapper=no | |
| 137 clang_wrapper=no | |
| 138 | |
| 139 for arg ; do | |
| 140 case "$arg" in | |
| 141 --help) usage ;; | |
| 142 --prefix=*) prefix=${arg#*=} ;; | |
| 143 --exec-prefix=*) exec_prefix=${arg#*=} ;; | |
| 144 --bindir=*) bindir=${arg#*=} ;; | |
| 145 --libdir=*) libdir=${arg#*=} ;; | |
| 146 --includedir=*) includedir=${arg#*=} ;; | |
| 147 --syslibdir=*) syslibdir=${arg#*=} ;; | |
| 148 --enable-shared|--enable-shared=yes) shared=yes ;; | |
| 149 --disable-shared|--enable-shared=no) shared=no ;; | |
| 150 --enable-static|--enable-static=yes) static=yes ;; | |
| 151 --disable-static|--enable-static=no) static=no ;; | |
| 152 --enable-optimize) optimize=yes ;; | |
| 153 --enable-optimize=*) optimize=${arg#*=} ;; | |
| 154 --disable-optimize) optimize=no ;; | |
| 155 --enable-debug|--enable-debug=yes) debug=yes ;; | |
| 156 --disable-debug|--enable-debug=no) debug=no ;; | |
| 157 --enable-warnings|--enable-warnings=yes) warnings=yes ;; | |
| 158 --disable-warnings|--enable-warnings=no) warnings=no ;; | |
| 159 --enable-visibility|--enable-visibility=yes) visibility=yes ;; | |
| 160 --disable-visibility|--enable-visibility=no) visibility=no ;; | |
| 161 --enable-wrapper|--enable-wrapper=yes) wrapper=detect ;; | |
| 162 --enable-wrapper=all) wrapper=yes ; gcc_wrapper=yes ; clang_wrapper=yes ;; | |
| 163 --enable-wrapper=gcc) wrapper=yes ; gcc_wrapper=yes ;; | |
| 164 --enable-wrapper=clang) wrapper=yes ; clang_wrapper=yes ;; | |
| 165 --disable-wrapper|--enable-wrapper=no) wrapper=no ;; | |
| 166 --enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ; gcc_wrapper=yes ;; | |
| 167 --disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;; | |
| 168 --enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;; | |
| 169 --host=*|--target=*) target=${arg#*=} ;; | |
| 170 -* ) echo "$0: unknown option $arg" ;; | |
| 171 CC=*) CC=${arg#*=} ;; | |
| 172 CFLAGS=*) CFLAGS=${arg#*=} ;; | |
| 173 CPPFLAGS=*) CPPFLAGS=${arg#*=} ;; | |
| 174 LDFLAGS=*) LDFLAGS=${arg#*=} ;; | |
| 175 CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;; | |
| 176 LIBCC=*) LIBCC=${arg#*=} ;; | |
| 177 *=*) ;; | |
| 178 *) target=$arg ;; | |
| 179 esac | |
| 180 done | |
| 181 | |
| 182 for i in prefix exec_prefix bindir libdir includedir syslibdir ; do | |
| 183 stripdir $i | |
| 184 done | |
| 185 | |
| 186 # | |
| 187 # Get a temp filename we can use | |
| 188 # | |
| 189 i=0 | |
| 190 set -C | |
| 191 while : ; do i=$(($i+1)) | |
| 192 tmpc="./conf$$-$PPID-$i.c" | |
| 193 2>|/dev/null > "$tmpc" && break | |
| 194 test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc" | |
| 195 done | |
| 196 set +C | |
| 197 trap 'rm "$tmpc"' EXIT INT QUIT TERM HUP | |
| 198 | |
| 199 # | |
| 200 # Find a C compiler to use | |
| 201 # | |
| 202 printf "checking for C compiler... " | |
| 203 trycc ${CROSS_COMPILE}gcc | |
| 204 trycc ${CROSS_COMPILE}c99 | |
| 205 trycc ${CROSS_COMPILE}cc | |
| 206 printf "%s\n" "$CC" | |
| 207 test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; } | |
| 208 | |
| 209 printf "checking whether C compiler works... " | |
| 210 echo "typedef int x;" > "$tmpc" | |
| 211 if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then | |
| 212 printf "yes\n" | |
| 213 else | |
| 214 printf "no; compiler output follows:\n%s\n" "$output" | |
| 215 exit 1 | |
| 216 fi | |
| 217 | |
| 218 # | |
| 219 # Figure out options to force errors on unknown flags. | |
| 220 # | |
| 221 tryflag CFLAGS_TRY -Werror=unknown-warning-option | |
| 222 tryflag CFLAGS_TRY -Werror=unused-command-line-argument | |
| 223 tryldflag LDFLAGS_TRY -Werror=unknown-warning-option | |
| 224 tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument | |
| 225 | |
| 226 # | |
| 227 # Need to know if the compiler is gcc or clang to decide which toolchain | |
| 228 # wrappers to build. | |
| 229 # | |
| 230 printf "checking for C compiler family... " | |
| 231 cc_ver="$(LC_ALL=C $CC -v 2>&1)" | |
| 232 cc_family=unknown | |
| 233 if fnmatch '*gcc\ version*' "$cc_ver" ; then | |
| 234 cc_family=gcc | |
| 235 elif fnmatch '*clang\ version*' "$cc_ver" ; then | |
| 236 cc_family=clang | |
| 237 fi | |
| 238 echo "$cc_family" | |
| 239 | |
| 240 # | |
| 241 # Figure out toolchain wrapper to build | |
| 242 # | |
| 243 if test "$wrapper" = auto -o "$wrapper" = detect ; then | |
| 244 echo "#include <stdlib.h>" > "$tmpc" | |
| 245 echo "#if ! __GLIBC__" >> "$tmpc" | |
| 246 echo "#error no" >> "$tmpc" | |
| 247 echo "#endif" >> "$tmpc" | |
| 248 printf "checking for toolchain wrapper to build... " | |
| 249 if test "$wrapper" = auto && ! $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; the
n | |
| 250 echo "none" | |
| 251 elif test "$cc_family" = gcc ; then | |
| 252 gcc_wrapper=yes | |
| 253 echo "gcc" | |
| 254 elif test "$cc_family" = clang ; then | |
| 255 clang_wrapper=yes | |
| 256 echo "clang" | |
| 257 else | |
| 258 echo "none" | |
| 259 if test "$wrapper" = detect ; then | |
| 260 fail "$0: could not find an appropriate toolchain wrapper" | |
| 261 fi | |
| 262 fi | |
| 263 fi | |
| 264 | |
| 265 if test "$gcc_wrapper" = yes ; then | |
| 266 tools="$tools tools/musl-gcc" | |
| 267 tool_libs="$tool_libs lib/musl-gcc.specs" | |
| 268 fi | |
| 269 if test "$clang_wrapper" = yes ; then | |
| 270 tools="$tools tools/musl-clang tools/ld.musl-clang" | |
| 271 fi | |
| 272 | |
| 273 # | |
| 274 # Find the target architecture | |
| 275 # | |
| 276 printf "checking target system type... " | |
| 277 test -n "$target" || target=$($CC -dumpmachine 2>/dev/null) || target=unknown | |
| 278 printf "%s\n" "$target" | |
| 279 | |
| 280 # | |
| 281 # Convert to just ARCH | |
| 282 # | |
| 283 case "$target" in | |
| 284 # Catch these early to simplify matching for 32-bit archs | |
| 285 mips64*|powerpc64*) fail "$0: unsupported target \"$target\"" ;; | |
| 286 arm*) ARCH=arm ;; | |
| 287 aarch64*) ARCH=aarch64 ;; | |
| 288 i?86*) ARCH=i386 ;; | |
| 289 x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;; | |
| 290 x86_64*) ARCH=x86_64 ;; | |
| 291 mips*) ARCH=mips ;; | |
| 292 microblaze*) ARCH=microblaze ;; | |
| 293 or1k*) ARCH=or1k ;; | |
| 294 powerpc*) ARCH=powerpc ;; | |
| 295 sh[1-9bel-]*|sh|superh*) ARCH=sh ;; | |
| 296 unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;; | |
| 297 *) fail "$0: unknown or unsupported target \"$target\"" ;; | |
| 298 esac | |
| 299 | |
| 300 # | |
| 301 # Try to get a conforming C99 freestanding environment | |
| 302 # | |
| 303 tryflag CFLAGS_C99FSE -std=c99 | |
| 304 tryflag CFLAGS_C99FSE -nostdinc | |
| 305 tryflag CFLAGS_C99FSE -ffreestanding \ | |
| 306 || tryflag CFLAGS_C99FSE -fno-builtin | |
| 307 tryflag CFLAGS_C99FSE -fexcess-precision=standard \ | |
| 308 || { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; } | |
| 309 tryflag CFLAGS_C99FSE -frounding-math | |
| 310 | |
| 311 # | |
| 312 # We may use the may_alias attribute if __GNUC__ is defined, so | |
| 313 # if the compiler defines __GNUC__ but does not provide it, | |
| 314 # it must be defined away as part of the CFLAGS. | |
| 315 # | |
| 316 printf "checking whether compiler needs attribute((may_alias)) suppression... " | |
| 317 cat > "$tmpc" <<EOF | |
| 318 typedef int | |
| 319 #ifdef __GNUC__ | |
| 320 __attribute__((__may_alias__)) | |
| 321 #endif | |
| 322 x; | |
| 323 EOF | |
| 324 if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ | |
| 325 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then | |
| 326 printf "no\n" | |
| 327 else | |
| 328 printf "yes\n" | |
| 329 CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__=" | |
| 330 fi | |
| 331 | |
| 332 # | |
| 333 # The GNU toolchain defaults to assuming unmarked files need an | |
| 334 # executable stack, potentially exposing vulnerabilities in programs | |
| 335 # linked with such object files. Fix this. | |
| 336 # | |
| 337 tryflag CFLAGS_C99FSE -Wa,--noexecstack | |
| 338 | |
| 339 # | |
| 340 # Check for options to disable stack protector, which needs to be | |
| 341 # disabled for a few early-bootstrap translation units. If not found, | |
| 342 # this is not an error; we assume the toolchain does not do ssp. | |
| 343 # | |
| 344 tryflag CFLAGS_NOSSP -fno-stack-protector | |
| 345 | |
| 346 # | |
| 347 # Check for options that may be needed to prevent the compiler from | |
| 348 # generating self-referential versions of memcpy,, memmove, memcmp, | |
| 349 # and memset. Really, we should add a check to determine if this | |
| 350 # option is sufficient, and if not, add a macro to cripple these | |
| 351 # functions with volatile... | |
| 352 # | |
| 353 tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns | |
| 354 | |
| 355 # | |
| 356 # Enable debugging if requessted. | |
| 357 # | |
| 358 test "$debug" = yes && CFLAGS_AUTO=-g | |
| 359 | |
| 360 # | |
| 361 # Preprocess asm files to add extra debugging information if debug is | |
| 362 # enabled, our assembler supports the needed directives, and the | |
| 363 # preprocessing script has been written for our architecture. | |
| 364 # | |
| 365 printf "checking whether we should preprocess assembly to add debugging informat
ion... " | |
| 366 if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" && | |
| 367 test -f "tools/add-cfi.$ARCH.awk" && | |
| 368 printf ".file 1 \"srcfile.s\"\n.line 1\n.cfi_startproc\n.cfi_endproc" | $CC -
g -x assembler -c -o /dev/null 2>/dev/null - | |
| 369 then | |
| 370 ADD_CFI=yes | |
| 371 else | |
| 372 ADD_CFI=no | |
| 373 fi | |
| 374 printf "%s\n" "$ADD_CFI" | |
| 375 | |
| 376 # | |
| 377 # Possibly add a -O option to CFLAGS and select modules to optimize with | |
| 378 # -O3 based on the status of --enable-optimize and provided CFLAGS. | |
| 379 # | |
| 380 printf "checking for optimization settings... " | |
| 381 case "x$optimize" in | |
| 382 xauto) | |
| 383 if fnmatch '-O*|*\ -O*' "$CFLAGS_AUTO $CFLAGS" ; then | |
| 384 printf "using provided CFLAGS\n" ;optimize=no | |
| 385 else | |
| 386 printf "using defaults\n" ; optimize=yes | |
| 387 fi | |
| 388 ;; | |
| 389 xsize|xnone) printf "minimize size\n" ; optimize=size ;; | |
| 390 xno|x) printf "disabled\n" ; optimize=no ;; | |
| 391 *) printf "custom\n" ;; | |
| 392 esac | |
| 393 | |
| 394 test "$optimize" = no || tryflag CFLAGS_AUTO -Os || tryflag CFLAGS_AUTO -O2 | |
| 395 test "$optimize" = yes && optimize="internal,malloc,string" | |
| 396 | |
| 397 if fnmatch 'no|size' "$optimize" ; then : | |
| 398 else | |
| 399 printf "components to be optimized for speed:" | |
| 400 while test "$optimize" ; do | |
| 401 case "$optimize" in | |
| 402 *,*) this=${optimize%%,*} optimize=${optimize#*,} ;; | |
| 403 *) this=$optimize optimize= | |
| 404 esac | |
| 405 printf " $this" | |
| 406 case "$this" in | |
| 407 */*.c) ;; | |
| 408 */*) this=$this*.c ;; | |
| 409 *) this=$this/*.c ;; | |
| 410 esac | |
| 411 OPTIMIZE_GLOBS="$OPTIMIZE_GLOBS $this" | |
| 412 done | |
| 413 OPTIMIZE_GLOBS=${OPTIMIZE_GLOBS# } | |
| 414 printf "\n" | |
| 415 fi | |
| 416 | |
| 417 # Always try -pipe | |
| 418 tryflag CFLAGS_AUTO -pipe | |
| 419 | |
| 420 # | |
| 421 # If debugging is disabled, omit frame pointer. Modern GCC does this | |
| 422 # anyway on most archs even when debugging is enabled since the frame | |
| 423 # pointer is no longer needed for debugging. | |
| 424 # | |
| 425 if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" ; then : | |
| 426 else | |
| 427 tryflag CFLAGS_AUTO -fomit-frame-pointer | |
| 428 fi | |
| 429 | |
| 430 # | |
| 431 # Modern GCC wants to put DWARF tables (used for debugging and | |
| 432 # unwinding) in the loaded part of the program where they are | |
| 433 # unstrippable. These options force them back to debug sections (and | |
| 434 # cause them not to get generated at all if debugging is off). | |
| 435 # | |
| 436 tryflag CFLAGS_AUTO -fno-unwind-tables | |
| 437 tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables | |
| 438 | |
| 439 # | |
| 440 # Attempt to put each function and each data object in its own | |
| 441 # section. This both allows additional size optimizations at link | |
| 442 # time and works around a dangerous class of compiler/assembler bugs | |
| 443 # whereby relative address expressions are constant-folded by the | |
| 444 # assembler even when one or more of the symbols involved is | |
| 445 # replaceable. See gas pr 18561 and gcc pr 66609, 68178, etc. | |
| 446 # | |
| 447 tryflag CFLAGS_AUTO -ffunction-sections | |
| 448 tryflag CFLAGS_AUTO -fdata-sections | |
| 449 | |
| 450 # | |
| 451 # On x86, make sure we don't have incompatible instruction set | |
| 452 # extensions enabled by default. This is bad for making static binaries. | |
| 453 # We cheat and use i486 rather than i386 because i386 really does not | |
| 454 # work anyway (issues with atomic ops). | |
| 455 # Some build environments pass -march and -mtune options via CC, so | |
| 456 # check both CC and CFLAGS. | |
| 457 # | |
| 458 if test "$ARCH" = "i386" ; then | |
| 459 fnmatch '-march=*|*\ -march=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -march=i48
6 | |
| 460 fnmatch '-mtune=*|*\ -mtune=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -mtune=gen
eric | |
| 461 fi | |
| 462 | |
| 463 # | |
| 464 # Even with -std=c99, gcc accepts some constructs which are constraint | |
| 465 # violations. We want to treat these as errors regardless of whether | |
| 466 # other purely stylistic warnings are enabled -- especially implicit | |
| 467 # function declarations, which are a dangerous programming error. | |
| 468 # | |
| 469 tryflag CFLAGS_AUTO -Werror=implicit-function-declaration | |
| 470 tryflag CFLAGS_AUTO -Werror=implicit-int | |
| 471 tryflag CFLAGS_AUTO -Werror=pointer-sign | |
| 472 tryflag CFLAGS_AUTO -Werror=pointer-arith | |
| 473 | |
| 474 if test "x$warnings" = xyes ; then | |
| 475 tryflag CFLAGS_AUTO -Wall | |
| 476 tryflag CFLAGS_AUTO -Wno-parentheses | |
| 477 tryflag CFLAGS_AUTO -Wno-uninitialized | |
| 478 tryflag CFLAGS_AUTO -Wno-missing-braces | |
| 479 tryflag CFLAGS_AUTO -Wno-unused-value | |
| 480 tryflag CFLAGS_AUTO -Wno-unused-but-set-variable | |
| 481 tryflag CFLAGS_AUTO -Wno-unknown-pragmas | |
| 482 tryflag CFLAGS_AUTO -Wno-pointer-to-int-cast | |
| 483 fi | |
| 484 | |
| 485 if test "x$visibility" = xauto ; then | |
| 486 # This test checks toolchain support for several things: | |
| 487 # - the -include option | |
| 488 # - the attributes/pragmas used in vis.h | |
| 489 # - linking code that takes the address of protected symbols | |
| 490 # - gcc 3.x bug that wrongly claims declarations mismatch | |
| 491 printf "checking whether global visibility preinclude works... " | |
| 492 cat > "$tmpc" <<EOF | |
| 493 __attribute__((__visibility__("default"))) | |
| 494 extern struct a *const x; | |
| 495 typedef struct a b; | |
| 496 extern b *const x; | |
| 497 b *const x; | |
| 498 int (*fp)(void); | |
| 499 int foo(void) { } | |
| 500 int bar(void) { fp = foo; return foo(); } | |
| 501 EOF | |
| 502 if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS \ | |
| 503 -DSHARED -fPIC -I./src/internal -include vis.h \ | |
| 504 -nostdlib -shared -Wl,-Bsymbolic-functions \ | |
| 505 -o /dev/null "$tmpc" >/dev/null 2>&1 ; then | |
| 506 visibility=yes | |
| 507 else | |
| 508 visibility=no | |
| 509 fi | |
| 510 printf "%s\n" "$visibility" | |
| 511 fi | |
| 512 | |
| 513 if test "x$visibility" = xyes ; then | |
| 514 CFLAGS_AUTO="$CFLAGS_AUTO -include vis.h" | |
| 515 CFLAGS_AUTO="${CFLAGS_AUTO# }" | |
| 516 fi | |
| 517 | |
| 518 # Reduce space lost to padding for alignment purposes by sorting data | |
| 519 # objects according to their alignment reqirements. This approximates | |
| 520 # optimal packing. | |
| 521 tryldflag LDFLAGS_AUTO -Wl,--sort-section,alignment | |
| 522 tryldflag LDFLAGS_AUTO -Wl,--sort-common | |
| 523 | |
| 524 # When linking shared library, drop dummy weak definitions that were | |
| 525 # replaced by strong definitions from other translation units. | |
| 526 tryldflag LDFLAGS_AUTO -Wl,--gc-sections | |
| 527 | |
| 528 # Some patched GCC builds have these defaults messed up... | |
| 529 tryldflag LDFLAGS_AUTO -Wl,--hash-style=both | |
| 530 | |
| 531 # Prevent linking if there are undefined symbols; if any exist, | |
| 532 # libc.so will crash at runtime during relocation processing. | |
| 533 # The common way this can happen is failure to link the compiler | |
| 534 # runtime library; implementation error is also a possibility. | |
| 535 tryldflag LDFLAGS_AUTO -Wl,--no-undefined | |
| 536 | |
| 537 # Avoid exporting symbols from compiler runtime libraries. They | |
| 538 # should be hidden anyway, but some toolchains including old gcc | |
| 539 # versions built without shared library support and pcc are broken. | |
| 540 tryldflag LDFLAGS_AUTO -Wl,--exclude-libs=ALL | |
| 541 | |
| 542 test "$shared" = "no" || { | |
| 543 # Disable dynamic linking if ld is broken and can't do -Bsymbolic-functions | |
| 544 LDFLAGS_DUMMY= | |
| 545 tryldflag LDFLAGS_DUMMY -Wl,-Bsymbolic-functions || { | |
| 546 test "$shared" = "yes" && fail "$0: error: linker cannot build shared library" | |
| 547 printf "warning: disabling dynamic linking support\n" | |
| 548 shared=no | |
| 549 } | |
| 550 } | |
| 551 | |
| 552 # Find compiler runtime library | |
| 553 test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh | |
| 554 test -z "$LIBCC" && tryldflag LIBCC -lcompiler_rt | |
| 555 test -z "$LIBCC" && try_libcc=`$CC -print-file-name=libpcc.a 2>/dev/null` \ | |
| 556 && tryldflag LIBCC "$try_libcc" | |
| 557 printf "using compiler runtime libraries: %s\n" "$LIBCC" | |
| 558 | |
| 559 # Figure out arch variants for archs with variants | |
| 560 SUBARCH= | |
| 561 t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" | |
| 562 | |
| 563 if test "$ARCH" = "x86_64" ; then | |
| 564 trycppif __ILP32__ "$t" && ARCH=x32 | |
| 565 fi | |
| 566 | |
| 567 if test "$ARCH" = "arm" ; then | |
| 568 trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb | |
| 569 trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf | |
| 570 fi | |
| 571 | |
| 572 if test "$ARCH" = "aarch64" ; then | |
| 573 trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be | |
| 574 fi | |
| 575 | |
| 576 if test "$ARCH" = "mips" ; then | |
| 577 trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el | |
| 578 trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf | |
| 579 fi | |
| 580 | |
| 581 test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \ | |
| 582 && SUBARCH=${SUBARCH}el | |
| 583 | |
| 584 if test "$ARCH" = "sh" ; then | |
| 585 tryflag CFLAGS_AUTO -Wa,--isa=any | |
| 586 trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb | |
| 587 if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then | |
| 588 # Some sh configurations are broken and replace double with float | |
| 589 # rather than using softfloat when the fpu is present but only | |
| 590 # supports single precision. Reject them. | |
| 591 printf "checking whether compiler's double type is IEEE double... " | |
| 592 echo 'typedef char dblcheck[(int)sizeof(double)-5];' > "$tmpc" | |
| 593 if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1
; then | |
| 594 printf "yes\n" | |
| 595 else | |
| 596 printf "no\n" | |
| 597 fail "$0: error: compiler's floating point configuration is unsupported" | |
| 598 fi | |
| 599 else | |
| 600 SUBARCH=${SUBARCH}-nofpu | |
| 601 fi | |
| 602 if trycppif __SH_FDPIC__ "$t" ; then | |
| 603 SUBARCH=${SUBARCH}-fdpic | |
| 604 fi | |
| 605 fi | |
| 606 | |
| 607 test "$SUBARCH" \ | |
| 608 && printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH" | |
| 609 | |
| 610 case "$ARCH$SUBARCH" in | |
| 611 arm) ASMSUBARCH=el ;; | |
| 612 *) ASMSUBARCH=$SUBARCH ;; | |
| 613 esac | |
| 614 | |
| 615 # | |
| 616 # Some archs (powerpc) have different possible long double formats | |
| 617 # that the compiler can be configured for. The logic for whether this | |
| 618 # is supported is in bits/float.h; in general, it is not. We need to | |
| 619 # check for mismatches here or code in printf, strotd, and scanf will | |
| 620 # be dangerously incorrect because it depends on (1) the macros being | |
| 621 # correct, and (2) IEEE semantics. | |
| 622 # | |
| 623 printf "checking whether compiler's long double definition matches float.h... " | |
| 624 echo '#include <float.h>' > "$tmpc" | |
| 625 echo '#if LDBL_MANT_DIG == 53' >> "$tmpc" | |
| 626 echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc" | |
| 627 echo '#endif' >> "$tmpc" | |
| 628 if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ | |
| 629 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then | |
| 630 printf "yes\n" | |
| 631 else | |
| 632 printf "no\n" | |
| 633 fail "$0: error: unsupported long double type" | |
| 634 fi | |
| 635 | |
| 636 printf "creating config.mak... " | |
| 637 | |
| 638 cmdline=$(quote "$0") | |
| 639 for i ; do cmdline="$cmdline $(quote "$i")" ; done | |
| 640 | |
| 641 exec 3>&1 1>config.mak | |
| 642 | |
| 643 | |
| 644 cat << EOF | |
| 645 # This version of config.mak was generated by: | |
| 646 # $cmdline | |
| 647 # Any changes made here will be lost if configure is re-run | |
| 648 ARCH = $ARCH | |
| 649 SUBARCH = $SUBARCH | |
| 650 ASMSUBARCH = $ASMSUBARCH | |
| 651 prefix = $prefix | |
| 652 exec_prefix = $exec_prefix | |
| 653 bindir = $bindir | |
| 654 libdir = $libdir | |
| 655 includedir = $includedir | |
| 656 syslibdir = $syslibdir | |
| 657 CC = $CC | |
| 658 CFLAGS = $CFLAGS | |
| 659 CFLAGS_AUTO = $CFLAGS_AUTO | |
| 660 CFLAGS_C99FSE = $CFLAGS_C99FSE | |
| 661 CFLAGS_MEMOPS = $CFLAGS_MEMOPS | |
| 662 CFLAGS_NOSSP = $CFLAGS_NOSSP | |
| 663 CPPFLAGS = $CPPFLAGS | |
| 664 LDFLAGS = $LDFLAGS | |
| 665 LDFLAGS_AUTO = $LDFLAGS_AUTO | |
| 666 CROSS_COMPILE = $CROSS_COMPILE | |
| 667 LIBCC = $LIBCC | |
| 668 OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS | |
| 669 ALL_TOOLS = $tools | |
| 670 TOOL_LIBS = $tool_libs | |
| 671 ADD_CFI = $ADD_CFI | |
| 672 EOF | |
| 673 test "x$static" = xno && echo "STATIC_LIBS =" | |
| 674 test "x$shared" = xno && echo "SHARED_LIBS =" | |
| 675 test "x$cc_family" = xgcc && echo 'WRAPCC_GCC = $(CC)' | |
| 676 test "x$cc_family" = xclang && echo 'WRAPCC_CLANG = $(CC)' | |
| 677 exec 1>&3 3>&- | |
| 678 | |
| 679 printf "done\n" | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1574103002:
Remove cruft from fusl (Closed)
Base URL: https://github.com/domokit/mojo.git@master