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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 | #!/bin/sh usage () { cat <<EOF Usage: $0 [OPTION]... [VAR=VALUE]... [TARGET] To assign environment variables (e.g., CC, CFLAGS...), specify them as VAR=VALUE. See below for descriptions of some of the useful variables. Defaults for the options are specified in brackets. Installation directories: --prefix=PREFIX main installation prefix [/usr/local/musl] --exec-prefix=EPREFIX installation prefix for executable files [PREFIX] Fine tuning of the installation directories: --bindir=DIR user executables [EPREFIX/bin] --libdir=DIR library files for the linker [PREFIX/lib] --includedir=DIR include files for the C compiler [PREFIX/include] --syslibdir=DIR location for the dynamic linker [/lib] System types: --target=TARGET configure to run on target TARGET [detected] --host=HOST same as --target Optional features: --enable-optimize=... optimize listed components for speed over size [auto] --enable-debug build with debugging information [disabled] --enable-warnings build with recommended warnings flags [disabled] --enable-gcc-wrapper build musl-gcc toolchain wrapper [auto] --disable-shared inhibit building shared library [enabled] --disable-static inhibit building static library [enabled] Some influential environment variables: CC C compiler command [detected] CFLAGS C compiler flags [-Os -pipe ...] CROSS_COMPILE prefix for cross compiler and tools [none] LIBCC compiler runtime library [detected] Use these variables to override the choices made by configure. EOF exit 0 } # Helper functions quote () { tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; } $1 EOF printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#" } echo () { printf "%s\n" "$*" ; } fail () { echo "$*" ; exit 1 ; } fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; } cmdexists () { type "$1" >/dev/null 2>&1 ; } trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; } stripdir () { while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done } trycppif () { printf "checking preprocessor condition %s... " "$1" echo "typedef int x;" > "$tmpc" echo "#if $1" >> "$tmpc" echo "#error yes" >> "$tmpc" echo "#endif" >> "$tmpc" if $CC $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "false\n" return 1 else printf "true\n" return 0 fi } tryflag () { printf "checking whether compiler accepts %s... " "$2" echo "typedef int x;" > "$tmpc" if $CC "$2" -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" eval "$1=\"\${$1} \$2\"" eval "$1=\${$1# }" return 0 else printf "no\n" return 1 fi } tryldflag () { printf "checking whether linker accepts %s... " "$2" echo "typedef int x;" > "$tmpc" if $CC -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" eval "$1=\"\${$1} \$2\"" eval "$1=\${$1# }" return 0 else printf "no\n" return 1 fi } # Beginning of actual script CFLAGS_C99FSE= CFLAGS_AUTO= CFLAGS_MEMOPS= LDFLAGS_AUTO= OPTIMIZE_GLOBS= prefix=/usr/local/musl exec_prefix='$(prefix)' bindir='$(exec_prefix)/bin' libdir='$(prefix)/lib' includedir='$(prefix)/include' syslibdir='/lib' target= optimize=auto debug=no warnings=no shared=yes static=yes wrapper=auto for arg ; do case "$arg" in --help) usage ;; --prefix=*) prefix=${arg#*=} ;; --exec-prefix=*) exec_prefix=${arg#*=} ;; --bindir=*) bindir=${arg#*=} ;; --libdir=*) libdir=${arg#*=} ;; --includedir=*) includedir=${arg#*=} ;; --syslibdir=*) syslibdir=${arg#*=} ;; --enable-shared|--enable-shared=yes) shared=yes ;; --disable-shared|--enable-shared=no) shared=no ;; --enable-static|--enable-static=yes) static=yes ;; --disable-static|--enable-static=no) static=no ;; --enable-optimize) optimize=yes ;; --enable-optimize=*) optimize=${arg#*=} ;; --disable-optimize) optimize=no ;; --enable-debug|--enable-debug=yes) debug=yes ;; --disable-debug|--enable-debug=no) debug=no ;; --enable-warnings|--enable-warnings=yes) warnings=yes ;; --disable-warnings|--enable-warnings=no) warnings=no ;; --enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ;; --disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;; --enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;; --host=*|--target=*) target=${arg#*=} ;; -* ) echo "$0: unknown option $arg" ;; CC=*) CC=${arg#*=} ;; CFLAGS=*) CFLAGS=${arg#*=} ;; CPPFLAGS=*) CPPFLAGS=${arg#*=} ;; LDFLAGS=*) LDFLAGS=${arg#*=} ;; CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;; LIBCC=*) LIBCC=${arg#*=} ;; *=*) ;; *) target=$arg ;; esac done for i in prefix exec_prefix bindir libdir includedir syslibdir ; do stripdir $i done # # Get a temp filename we can use # i=0 set -C while : ; do i=$(($i+1)) tmpc="./conf$$-$PPID-$i.c" 2>|/dev/null > "$tmpc" && break test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc" done set +C trap 'rm "$tmpc"' EXIT INT QUIT TERM HUP # # Find a C compiler to use # printf "checking for C compiler... " trycc ${CROSS_COMPILE}gcc trycc ${CROSS_COMPILE}c99 trycc ${CROSS_COMPILE}cc printf "%s\n" "$CC" test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; } printf "checking whether C compiler works... " echo "typedef int x;" > "$tmpc" if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then printf "yes\n" else printf "no; compiler output follows:\n%s\n" "$output" exit 1 fi # # Need to know if the compiler is gcc to decide whether to build the # musl-gcc wrapper, and for critical bug detection in some gcc versions. # printf "checking whether compiler is gcc... " if fnmatch '*gcc\ version*' "$($CC -v 2>&1)" ; then cc_is_gcc=yes else cc_is_gcc=no fi echo "$cc_is_gcc" # # Only build musl-gcc wrapper if toolchain does not already target musl # if test "$wrapper" = auto ; then printf "checking whether to build musl-gcc wrapper... " if test "$cc_is_gcc" = yes ; then wrapper=yes while read line ; do case "$line" in */ld-musl-*) wrapper=no ;; esac done <<EOF $($CC -dumpspecs) EOF else wrapper=no fi echo "$wrapper" fi # # Find the target architecture # printf "checking target system type... " test -n "$target" || target=$($CC -dumpmachine 2>/dev/null) || target=unknown printf "%s\n" "$target" # # Convert to just ARCH # case "$target" in # Catch these early to simplify matching for 32-bit archs mips64*|powerpc64*) fail "$0: unsupported target \"$target\"" ;; arm*) ARCH=arm ;; i?86*) ARCH=i386 ;; x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;; x86_64*) ARCH=x86_64 ;; mips*) ARCH=mips ;; microblaze*) ARCH=microblaze ;; powerpc*) ARCH=powerpc ;; sh[1-9bel-]*|sh|superh*) ARCH=sh ;; unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;; *) fail "$0: unknown or unsupported target \"$target\"" ;; esac # # Try to get a conforming C99 freestanding environment # tryflag CFLAGS_C99FSE -std=c99 tryflag CFLAGS_C99FSE -nostdinc tryflag CFLAGS_C99FSE -ffreestanding \ || tryflag CFLAGS_C99FSE -fno-builtin tryflag CFLAGS_C99FSE -fexcess-precision=standard \ || { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; } tryflag CFLAGS_C99FSE -frounding-math # # We may use the may_alias attribute if __GNUC__ is defined, so # if the compiler defines __GNUC__ but does not provide it, # it must be defined away as part of the CFLAGS. # printf "checking whether compiler needs attribute((may_alias)) suppression... " cat > "$tmpc" <<EOF typedef int #ifdef __GNUC__ __attribute__((__may_alias__)) #endif x; EOF if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "no\n" else printf "yes\n" CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__=" fi # # Check for options that may be needed to prevent the compiler from # generating self-referential versions of memcpy,, memmove, memcmp, # and memset. Really, we should add a check to determine if this # option is sufficient, and if not, add a macro to cripple these # functions with volatile... # tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns # # If debugging is explicitly enabled, don't auto-enable optimizations # if test "$debug" = yes ; then CFLAGS_AUTO=-g test "$optimize" = auto && optimize=no fi # # Possibly add a -O option to CFLAGS and select modules to optimize with # -O3 based on the status of --enable-optimize and provided CFLAGS. # printf "checking for optimization settings... " case "x$optimize" in xauto) if fnmatch '-O*|*\ -O*' "$CFLAGS_AUTO $CFLAGS" ; then printf "using provided CFLAGS\n" ;optimize=no else printf "using defaults\n" ; optimize=yes fi ;; xsize|xnone) printf "minimize size\n" ; optimize=size ;; xno|x) printf "disabled\n" ; optimize=no ;; *) printf "custom\n" ;; esac test "$optimize" = no || tryflag CFLAGS_AUTO -Os || tryflag CFLAGS_AUTO -O2 test "$optimize" = yes && optimize="internal,malloc,string" if fnmatch 'no|size' "$optimize" ; then : else printf "components to be optimized for speed:" while test "$optimize" ; do case "$optimize" in *,*) this=${optimize%%,*} optimize=${optimize#*,} ;; *) this=$optimize optimize= esac printf " $this" case "$this" in */*.c) ;; */*) this=$this*.c ;; *) this=$this/*.c ;; esac OPTIMIZE_GLOBS="$OPTIMIZE_GLOBS $this" done OPTIMIZE_GLOBS=${OPTIMIZE_GLOBS# } printf "\n" fi # Always try -pipe tryflag CFLAGS_AUTO -pipe # # If debugging is disabled, omit frame pointer. Modern GCC does this # anyway on most archs even when debugging is enabled since the frame # pointer is no longer needed for debugging. # if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" ; then : else tryflag CFLAGS_AUTO -fomit-frame-pointer fi # # Modern GCC wants to put DWARF tables (used for debugging and # unwinding) in the loaded part of the program where they are # unstrippable. These options force them back to debug sections (and # cause them not to get generated at all if debugging is off). # tryflag CFLAGS_AUTO -fno-unwind-tables tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables # # The GNU toolchain defaults to assuming unmarked files need an # executable stack, potentially exposing vulnerabilities in programs # linked with such object files. Fix this. # tryflag CFLAGS_AUTO -Wa,--noexecstack # # On x86, make sure we don't have incompatible instruction set # extensions enabled by default. This is bad for making static binaries. # We cheat and use i486 rather than i386 because i386 really does not # work anyway (issues with atomic ops). # if test "$ARCH" = "i386" ; then fnmatch '-march=*|*\ -march=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -march=i486 fnmatch '-mtune=*|*\ -mtune=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic fi # # Even with -std=c99, gcc accepts some constructs which are constraint # violations. We want to treat these as errors regardless of whether # other purely stylistic warnings are enabled -- especially implicit # function declarations, which are a dangerous programming error. # tryflag CFLAGS_AUTO -Werror=implicit-function-declaration tryflag CFLAGS_AUTO -Werror=implicit-int tryflag CFLAGS_AUTO -Werror=pointer-sign tryflag CFLAGS_AUTO -Werror=pointer-arith if test "x$warnings" = xyes ; then tryflag CFLAGS_AUTO -Wall tryflag CFLAGS_AUTO -Wno-parentheses tryflag CFLAGS_AUTO -Wno-uninitialized tryflag CFLAGS_AUTO -Wno-missing-braces tryflag CFLAGS_AUTO -Wno-unused-value tryflag CFLAGS_AUTO -Wno-unused-but-set-variable tryflag CFLAGS_AUTO -Wno-unknown-pragmas tryflag CFLAGS_AUTO -Wno-pointer-to-int-cast fi # Some patched GCC builds have these defaults messed up... tryflag CFLAGS_AUTO -fno-stack-protector tryldflag LDFLAGS_AUTO -Wl,--hash-style=both # Disable dynamic linking if ld is broken and can't do -Bsymbolic-functions LDFLAGS_DUMMY= tryldflag LDFLAGS_DUMMY -Wl,-Bsymbolic-functions || { printf "warning: disabling dynamic linking support\n" shared=no } # Find compiler runtime library test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh test -z "$LIBCC" && tryldflag LIBCC -lcompiler_rt test -z "$LIBCC" && try_libcc=`$CC -print-file-name=libpcc.a 2>/dev/null` \ && tryldflag LIBCC "$try_libcc" printf "using compiler runtime libraries: %s\n" "$LIBCC" # Figure out arch variants for archs with variants SUBARCH= t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS_AUTO $CFLAGS" if test "$ARCH" = "x86_64" ; then trycppif __ILP32__ "$t" && ARCH=x32 fi if test "$ARCH" = "arm" ; then trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf fi if test "$ARCH" = "mips" ; then trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf fi test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \ && SUBARCH=${SUBARCH}el if test "$ARCH" = "sh" ; then trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then # Some sh configurations are broken and replace double with float # rather than using softfloat when the fpu is present but only # supports single precision. Reject them. printf "checking whether compiler's double type is IEEE double... " echo 'typedef char dblcheck[(int)sizeof(double)-5];' > "$tmpc" if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" else printf "no\n" fail "$0: error: compiler's floating point configuration is unsupported" fi else SUBARCH=${SUBARCH}-nofpu fi fi test "$SUBARCH" \ && printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH" case "$ARCH$SUBARCH" in arm) ASMSUBARCH=el ;; *) ASMSUBARCH=$SUBARCH ;; esac # # Some archs (powerpc) have different possible long double formats # that the compiler can be configured for. The logic for whether this # is supported is in bits/float.h; in general, it is not. We need to # check for mismatches here or code in printf, strotd, and scanf will # be dangerously incorrect because it depends on (1) the macros being # correct, and (2) IEEE semantics. # printf "checking whether compiler's long double definition matches float.h... " echo '#include <float.h>' > "$tmpc" echo '#if LDBL_MANT_DIG == 53' >> "$tmpc" echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc" echo '#endif' >> "$tmpc" if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" else printf "no\n" fail "$0: error: unsupported long double type" fi # # Check for known bug in GCC 4.9.0 that results in a broken libc. # if test "$cc_is_gcc" = yes ; then printf "checking for gcc constant folding bug with weak aliases... " echo 'static int x = 0;' > "$tmpc" echo 'extern int y __attribute__((__weak__, __alias__("x")));' >> "$tmpc" echo 'extern int should_appear;' >> "$tmpc" echo 'int foo() { return y ? should_appear : 0; }' >> "$tmpc" case "$($CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include \ $CPPFLAGS $CFLAGS_AUTO $CFLAGS -S -o - "$tmpc" 2>/dev/null)" in *should_appear*) printf "no\n" ;; *) printf "yes\n" fail "$0: error: broken compiler; try CFLAGS=-fno-toplevel-reorder" ;; esac fi printf "creating config.mak... " cmdline=$(quote "$0") for i ; do cmdline="$cmdline $(quote "$i")" ; done exec 3>&1 1>config.mak cat << EOF # This version of config.mak was generated by: # $cmdline # Any changes made here will be lost if configure is re-run ARCH = $ARCH SUBARCH = $SUBARCH ASMSUBARCH = $ASMSUBARCH prefix = $prefix exec_prefix = $exec_prefix bindir = $bindir libdir = $libdir includedir = $includedir syslibdir = $syslibdir CC = $CC CFLAGS = $CFLAGS_AUTO $CFLAGS CFLAGS_C99FSE = $CFLAGS_C99FSE CFLAGS_MEMOPS = $CFLAGS_MEMOPS CPPFLAGS = $CPPFLAGS LDFLAGS = $LDFLAGS_AUTO $LDFLAGS CROSS_COMPILE = $CROSS_COMPILE LIBCC = $LIBCC OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS EOF test "x$static" = xno && echo "STATIC_LIBS =" test "x$shared" = xno && echo "SHARED_LIBS =" test "x$wrapper" = xno && echo "ALL_TOOLS =" test "x$wrapper" = xno && echo "TOOL_LIBS =" exec 1>&3 3>&- printf "done\n" |