tools/compilers/gcc-glibc/gcc-4.9.2-existing.patch

   1 diff -ruB --unidirectional-new-file ../gcc-4.9.2/config/gthr.m4 ../gcc-4.9.2-akaros/config/gthr.m4
   2 --- gcc-4.9.2/config/gthr.m4    2012-10-15 09:10:30.000000000 -0400
   3 +++ gcc-4.9.2-akaros/config/gthr.m4     2017-03-03 10:23:03.195008678 -0500
   4 @@ -11,6 +11,7 @@
   5  AC_DEFUN([GCC_AC_THREAD_HEADER],
   6  [
   7  case $1 in
   8 +    akaros)    thread_header=config/gthr-akaros.h ;;
   9      aix)       thread_header=config/rs6000/gthr-aix.h ;;
  10      dce)       thread_header=config/pa/gthr-dce.h ;;
  11      lynx)      thread_header=config/gthr-lynx.h ;;
  12 diff -ruB --unidirectional-new-file ../gcc-4.9.2/config.sub ../gcc-4.9.2-akaros/config.sub
  13 --- gcc-4.9.2/config.sub        2013-10-01 12:50:56.000000000 -0400
  14 +++ gcc-4.9.2-akaros/config.sub 2015-12-17 14:58:45.053386336 -0500
  15 @@ -1356,7 +1356,7 @@
  16               | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
  17               | -sym* | -kopensolaris* | -plan9* \
  18               | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
  19 -             | -aos* | -aros* \
  20 +             | -aos* | -aros* | -akaros* \
  21               | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
  22               | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
  23               | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
  24 diff -ruB --unidirectional-new-file ../gcc-4.9.2/gcc/config.gcc ../gcc-4.9.2-akaros/gcc/config.gcc
  25 --- gcc-4.9.2/gcc/config.gcc    2014-09-17 10:16:02.000000000 -0400
  26 +++ gcc-4.9.2-akaros/gcc/config.gcc     2016-08-29 14:36:33.860402669 -0400
  27 @@ -878,6 +878,25 @@
  28    default_use_cxa_atexit=yes
  29    use_gcc_stdint=wrap
  30    ;;
  31 +*-*-akaros*)
  32 +  # brho 2016-05-26 needed for various command line options like -rdynamic
  33 +  extra_options="$extra_options gnu-user.opt"
  34 +  # brho 2015-04-17
  35 +  # We need this for the shared libgcc_s.so
  36 +  tmake_file="t-slibgcc"
  37 +  # Linux has these options (among others that I removed).  I think it's saying
  38 +  # to use the glibc targetcm, which needs glibc-c.o to be built, which needs
  39 +  # the t-glibc makefrag
  40 +  c_target_objs="${c_target_objs} glibc-c.o"
  41 +  cxx_target_objs="${cxx_target_objs} glibc-c.o"
  42 +  tmake_file="${tmake_file} t-glibc"
  43 +  target_has_targetcm=yes
  44 +  # We've had these options for a while, linux also has them (and tgmath=no)
  45 +  default_use_cxa_atexit=yes
  46 +  use_gcc_stdint=wrap
  47 +  gas=yes
  48 +  gnu_ld=yes
  49 +  ;;
  50  esac
  51
  52  case ${target} in
  53 @@ -1357,6 +1376,27 @@
  54      tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h i386/rdos.h i386/rdos64.h"
  55      tmake_file="i386/t-i386elf t-svr4"
  56      ;;
  57 +# hasn't been compiled in a long time (2015-04-17)
  58 +i[34567]86-*-akaros*)
  59 +       # i386 linux, plus akaros/h i386/akaros.h
  60 +       # consider adding i386/gnu-user-common.h i386/gnu-user.h etc
  61 +       tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h glibc-stdint.h gnu-user.h akaros.h i386/akaros.h"
  62 +       # linux doesn't use the tmake_file here, but a subset of these is still
  63 +       # needed (probably the FP stuff)
  64 +       tmake_file="${tmake_file} t-slibgcc-elf-ver t-linux i386/t-fprules-softfp soft-fp/t-softfp i386/t-linux"
  65 +       ;;
  66 +x86_64-*-akaros*)
  67 +       # similar to linux, but minus some gnu bits.  gnu-user64 wants an x32 ld
  68 +       tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h gnu-user.h glibc-stdint.h i386/x86-64.h akaros.h i386/akaros64.h"
  69 +       tmake_file="${tmake_file} i386/t-linux64"
  70 +       # linux does not need these tmake files, but we need at least some of them.
  71 +       # without these, compilation failed.
  72 +       tmake_file="${tmake_file} i386/t-fprules-softfp soft-fp/t-softfp i386/t-linux"
  73 +       ;;
  74 +riscv*-*-akaros*)
  75 +       tm_file="dbxelf.h elfos.h gnu-user.h akaros.h ${tm_file} riscv/akaros.h riscv/akaros64.h glibc-stdint.h"
  76 +       tmake_file="${tmake_file} t-slibgcc-elf-ver t-linux"
  77 +       ;;
  78  i[34567]86-*-freebsd*)
  79         tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h ${fbsd_tm_file} i386/freebsd.h"
  80         ;;
  81 diff -ruB --unidirectional-new-file ../gcc-4.9.2/gcc/configure ../gcc-4.9.2-akaros/gcc/configure
  82 --- gcc-4.9.2/gcc/configure     2014-10-10 08:51:28.000000000 -0400
  83 +++ gcc-4.9.2-akaros/gcc/configure      2017-03-03 09:52:31.094928720 -0500
  84 @@ -11204,7 +11204,7 @@
  85      # default
  86      target_thread_file='single'
  87      ;;
  88 -  aix | dce | lynx | mipssde | posix | rtems | \
  89 +  akaros | aix | dce | lynx | mipssde | posix | rtems | \
  90    single | tpf | vxworks | win32)
  91      target_thread_file=${enable_threads}
  92      ;;
  93 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libgcc/config.host ../gcc-4.9.2-akaros/libgcc/config.host
  94 --- gcc-4.9.2/libgcc/config.host        2014-03-27 11:40:31.000000000 -0400
  95 +++ gcc-4.9.2-akaros/libgcc/config.host 2015-12-17 14:58:45.053386336 -0500
  96 @@ -226,7 +226,7 @@
  97        ;;
  98    esac
  99    ;;
 100 -*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu)
 101 +*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu | *-*-akaros*)
 102    tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip t-slibgcc t-slibgcc-gld t-slibgcc-elf-ver t-linux"
 103    extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 104    if test x$enable_vtable_verify = xyes; then
 105 @@ -562,12 +562,14 @@
 106         ;;
 107  x86_64-*-openbsd*)
 108         ;;
 109 +riscv*-*-akaros*)
 110 +       ;;
 111  i[34567]86-*-linux*)
 112         extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o crtfastmath.o"
 113         tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
 114         md_unwind_header=i386/linux-unwind.h
 115         ;;
 116 -i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* | i[34567]86-*-kopensolaris*-gnu)
 117 +i[34567]86-*-akaros* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i[34567]86-*-gnu* | i[34567]86-*-kopensolaris*-gnu)
 118         extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o crtfastmath.o"
 119         tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
 120         ;;
 121 @@ -576,7 +578,7 @@
 122         tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
 123         md_unwind_header=i386/linux-unwind.h
 124         ;;
 125 -x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
 126 +x86_64-*-akaros* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
 127         extra_parts="$extra_parts crtprec32.o crtprec64.o crtprec80.o crtfastmath.o"
 128         tmake_file="${tmake_file} i386/t-crtpc i386/t-crtfm i386/t-crtstuff t-dfprules"
 129         ;;
 130 @@ -1259,6 +1261,7 @@
 131    i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
 132    i[34567]86-*-linux* | x86_64-*-linux* | \
 133    i[34567]86-*-gnu* | \
 134 +  i[34567]86-*-akaros* | x86_64-*-akaros* | \
 135    i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]* | \
 136    i[34567]86-*-cygwin* | x86_64-*-cygwin* | \
 137    i[34567]86-*-mingw* | x86_64-*-mingw* | \
 138 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libgcc/configure ../gcc-4.9.2-akaros/libgcc/configure
 139 --- gcc-4.9.2/libgcc/configure  2014-02-07 02:46:34.000000000 -0500
 140 +++ gcc-4.9.2-akaros/libgcc/configure   2017-03-03 10:24:15.231328458 -0500
 141 @@ -4561,6 +4561,7 @@
 142  # Map from thread model to thread header.
 143
 144  case $target_thread_file in
 145 +    akaros)    thread_header=config/gthr-akaros.h ;;
 146      aix)       thread_header=config/rs6000/gthr-aix.h ;;
 147      dce)       thread_header=config/pa/gthr-dce.h ;;
 148      lynx)      thread_header=config/gthr-lynx.h ;;
 149 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libgcc/crtstuff.c ../gcc-4.9.2-akaros/libgcc/crtstuff.c
 150 --- gcc-4.9.2/libgcc/crtstuff.c 2014-03-10 14:31:20.000000000 -0400
 151 +++ gcc-4.9.2-akaros/libgcc/crtstuff.c  2016-10-05 17:05:34.811880982 -0400
 152 @@ -45,6 +45,8 @@
 153
 154     This file must be compiled with gcc.  */
 155
 156 +/* AKAROS: changed so we set # define USE_PT_GNU_EH_FRAME */
 157 +
 158  /* Target machine header files require this define. */
 159  #define IN_LIBGCC2
 160
 161 @@ -112,12 +114,14 @@
 162  # endif
 163  #endif
 164
 165 +/* AKAROS: added __gnu_akaros__ */
 166  #if defined(OBJECT_FORMAT_ELF) \
 167      && !defined(OBJECT_FORMAT_FLAT) \
 168      && defined(HAVE_LD_EH_FRAME_HDR) \
 169      && !defined(CRTSTUFFT_O) \
 170      && defined(inhibit_libc) \
 171 -    && (defined(__GLIBC__) || defined(__gnu_linux__) || defined(__GNU__))
 172 +    && (defined(__GLIBC__) || defined(__gnu_linux__) || \
 173 +           defined(__gnu_akaros__) || defined(__GNU__))
 174  /* On systems using glibc, an inhibit_libc build of libgcc is only
 175     part of a bootstrap process.  Build the same crt*.o as would be
 176     built with headers present, so that it is not necessary to build
 177 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libgomp/configure.tgt ../gcc-4.9.2-akaros/libgomp/configure.tgt
 178 --- gcc-4.9.2/libgomp/configure.tgt     2013-06-06 06:04:49.000000000 -0400
 179 +++ gcc-4.9.2-akaros/libgomp/configure.tgt      2015-12-17 14:58:45.053386336 -0500
 180 @@ -127,6 +127,10 @@
 181         esac
 182         ;;
 183
 184 +  *-*-akaros*)
 185 +       config_path="akaros posix"
 186 +       ;;
 187 +
 188    *-*-mingw32*)
 189         config_path="mingw32 posix"
 190         ;;
 191 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libstdc++-v3/configure ../gcc-4.9.2-akaros/libstdc++-v3/configure
 192 --- gcc-4.9.2/libstdc++-v3/configure    2014-03-20 14:57:07.000000000 -0400
 193 +++ gcc-4.9.2-akaros/libstdc++-v3/configure     2017-03-03 10:25:14.351591016 -0500
 194 @@ -6332,7 +6332,7 @@
 195    ;;
 196
 197  # This must be Linux ELF.
 198 -linux* | k*bsd*-gnu | kopensolaris*-gnu)
 199 +linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 200    lt_cv_deplibs_check_method=pass_all
 201    ;;
 202
 203 @@ -7118,7 +7118,7 @@
 204    rm -rf conftest*
 205    ;;
 206
 207 -x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
 208 +x86_64-*akaros*|x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
 209  s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
 210    # Find out which ABI we are using.
 211    echo 'int i;' > conftest.$ac_ext
 212 @@ -7133,7 +7133,7 @@
 213           x86_64-*kfreebsd*-gnu)
 214             LD="${LD-ld} -m elf_i386_fbsd"
 215             ;;
 216 -         x86_64-*linux*)
 217 +         x86_64-*linux*|x86_64-*akaros*)
 218             case `/usr/bin/file conftest.o` in
 219               *x86-64*)
 220                 LD="${LD-ld} -m elf32_x86_64"
 221 @@ -7162,7 +7162,7 @@
 222           x86_64-*kfreebsd*-gnu)
 223             LD="${LD-ld} -m elf_x86_64_fbsd"
 224             ;;
 225 -         x86_64-*linux*)
 226 +         x86_64-*linux*|x86_64-*akaros*)
 227             LD="${LD-ld} -m elf_x86_64"
 228             ;;
 229           powerpcle-*linux*)
 230 @@ -8684,7 +8684,7 @@
 231        lt_prog_compiler_static='-non_shared'
 232        ;;
 233
 234 -    linux* | k*bsd*-gnu | kopensolaris*-gnu)
 235 +    linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 236        case $cc_basename in
 237        # old Intel for x86_64 which still supported -KPIC.
 238        ecc*)
 239 @@ -9279,7 +9279,7 @@
 240        archive_expsym_cmds='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
 241        ;;
 242
 243 -    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
 244 +    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 245        tmp_diet=no
 246        if test "$host_os" = linux-dietlibc; then
 247         case $cc_basename in
 248 @@ -10819,7 +10819,7 @@
 249    ;;
 250
 251  # This must be Linux ELF.
 252 -linux* | k*bsd*-gnu | kopensolaris*-gnu)
 253 +linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 254    version_type=linux
 255    need_lib_prefix=no
 256    need_version=no
 257 @@ -12744,7 +12744,7 @@
 258          inherit_rpath_CXX=yes
 259          ;;
 260
 261 -      linux* | k*bsd*-gnu | kopensolaris*-gnu)
 262 +      linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 263          case $cc_basename in
 264            KCC*)
 265             # Kuck and Associates, Inc. (KAI) C++ Compiler
 266 @@ -13331,7 +13331,7 @@
 267    postdeps_CXX=
 268    ;;
 269
 270 -linux*)
 271 +linux* | akaros*)
 272    case `$CC -V 2>&1 | sed 5q` in
 273    *Sun\ C*)
 274      # Sun C++ 5.9
 275 @@ -13582,7 +13582,7 @@
 276             ;;
 277         esac
 278         ;;
 279 -      linux* | k*bsd*-gnu | kopensolaris*-gnu)
 280 +      linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 281         case $cc_basename in
 282           KCC*)
 283             # KAI C++ Compiler
 284 @@ -14503,7 +14503,7 @@
 285    ;;
 286
 287  # This must be Linux ELF.
 288 -linux* | k*bsd*-gnu | kopensolaris*-gnu)
 289 +linux* | k*bsd*-gnu | kopensolaris*-gnu | akaros*)
 290    version_type=linux
 291    need_lib_prefix=no
 292    need_version=no
 293 @@ -15183,6 +15183,7 @@
 294  $as_echo "$target_thread_file" >&6; }
 295
 296  case $target_thread_file in
 297 +    akaros)    thread_header=config/gthr-akaros.h ;;
 298      aix)       thread_header=config/rs6000/gthr-aix.h ;;
 299      dce)       thread_header=config/pa/gthr-dce.h ;;
 300      lynx)      thread_header=config/gthr-lynx.h ;;
 301 @@ -15214,7 +15215,7 @@
 302    if test x$gcc_no_link != xyes; then
 303      # Can do link tests. Limit to some tested platforms
 304      case "$host" in
 305 -      *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
 306 +      *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu* | *-*-akaros*)
 307         atomic_builtins_link_tests=yes
 308         ;;
 309      esac
 310 @@ -15843,7 +15844,7 @@
 311    # Default to "generic".
 312    if test $enable_clocale_flag = auto; then
 313      case ${target_os} in
 314 -      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
 315 +      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu | akaros*)
 316         enable_clocale_flag=gnu
 317         ;;
 318        darwin* | freebsd*)
 319 @@ -16239,7 +16240,7 @@
 320    # Default to "new".
 321    if test $enable_libstdcxx_allocator_flag = auto; then
 322      case ${target_os} in
 323 -      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
 324 +      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu | akaros*)
 325         enable_libstdcxx_allocator_flag=new
 326         ;;
 327        *)
 328 @@ -19461,7 +19462,7 @@
 329          ac_has_nanosleep=yes
 330          ac_has_sched_yield=yes
 331          ;;
 332 -      gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
 333 +      gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | akaros*)
 334          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for at least GNU libc 2.17" >&5
 335  $as_echo_n "checking for at least GNU libc 2.17... " >&6; }
 336          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 337 @@ -19961,7 +19962,7 @@
 338
 339    if test x"$ac_has_clock_monotonic" != x"yes"; then
 340      case ${target_os} in
 341 -      linux*)
 342 +      linux* | akaros*)
 343         { $as_echo "$as_me:${as_lineno-$LINENO}: checking for clock_gettime syscall" >&5
 344  $as_echo_n "checking for clock_gettime syscall... " >&6; }
 345         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 346 @@ -26836,7 +26837,7 @@
 347  if ac_fn_c_try_link "$LINENO"; then :
 348    chktls_save_LDFLAGS="$LDFLAGS"
 349                           case $host in
 350 -           *-*-linux*)
 351 +           *-*-linux* | *-*-akaros*)
 352               LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS"
 353               ;;
 354           esac
 355 @@ -27399,7 +27400,7 @@
 356                  if test "X$additional_includedir" = "X/usr/local/include"; then
 357                    if test -n "$GCC"; then
 358                      case $host_os in
 359 -                      linux*) haveit=yes;;
 360 +                      linux* | akaros*) haveit=yes;;
 361                      esac
 362                    fi
 363                  fi
 364 @@ -27443,7 +27444,7 @@
 365                        if test "X$additional_libdir" = "X/usr/local/lib"; then
 366                          if test -n "$GCC"; then
 367                            case $host_os in
 368 -                            linux*) haveit=yes;;
 369 +                            linux* | akaros*) haveit=yes;;
 370                            esac
 371                          fi
 372                        fi
 373 @@ -52273,7 +52274,7 @@
 374  if ac_fn_c_try_link "$LINENO"; then :
 375    chktls_save_LDFLAGS="$LDFLAGS"
 376                           case $host in
 377 -           *-*-linux*)
 378 +           *-*-linux* | *-*-akaros*)
 379               LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS"
 380               ;;
 381           esac
 382 @@ -52464,7 +52465,7 @@
 383         ;;
 384      esac
 385      ;;
 386 -  *-linux* | *-uclinux* | *-gnu* | *-kfreebsd*-gnu | *-knetbsd*-gnu | *-cygwin*)
 387 +  *-linux* | *-uclinux* | *-gnu* | *-kfreebsd*-gnu | *-knetbsd*-gnu | *-cygwin* | *-akaros*)
 388
 389    # All these tests are for C++; save the language and the compiler flags.
 390    # The CXXFLAGS thing is suspicious, but based on similar bits previously
 391 @@ -58474,7 +58475,7 @@
 392  if ac_fn_c_try_link "$LINENO"; then :
 393    chktls_save_LDFLAGS="$LDFLAGS"
 394                           case $host in
 395 -           *-*-linux*)
 396 +           *-*-linux* | *-*-akaros*)
 397               LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS"
 398               ;;
 399           esac
 400 @@ -77175,7 +77176,7 @@
 401
 402
 403  case "$target" in
 404 -  *-linux*)
 405 +  *-linux* | *-akaros*)
 406      case "$enable_linux_futex" in
 407        default)
 408         # If headers don't have gettid/futex syscalls definition, then
 409 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libstdc++-v3/configure.host ../gcc-4.9.2-akaros/libstdc++-v3/configure.host
 410 --- gcc-4.9.2/libstdc++-v3/configure.host       2013-07-04 17:07:44.000000000 -0400
 411 +++ gcc-4.9.2-akaros/libstdc++-v3/configure.host        2015-12-17 14:58:45.061386380 -0500
 412 @@ -298,6 +298,9 @@
 413      os_include_dir="os/qnx/qnx6.1"
 414      c_model=c
 415      ;;
 416 +  akaros*)
 417 +    os_include_dir="os/akaros"
 418 +    ;;
 419    solaris2)
 420      # This too-vague configuration does not provide enough information
 421      # to select a ctype include, and thus os_include_dir is a crap shoot.
 422 diff -ruB --unidirectional-new-file ../gcc-4.9.2/libstdc++-v3/crossconfig.m4 ../gcc-4.9.2-akaros/libstdc++-v3/crossconfig.m4
 423 --- gcc-4.9.2/libstdc++-v3/crossconfig.m4       2014-03-20 14:57:07.000000000 -0400
 424 +++ gcc-4.9.2-akaros/libstdc++-v3/crossconfig.m4        2015-12-17 14:58:45.061386380 -0500
 425 @@ -198,6 +198,10 @@
 426      AC_DEFINE(HAVE_SINHF)
 427      AC_DEFINE(HAVE_SINHL)
 428      ;;
 429 +  *-akaros*)
 430 +    GLIBCXX_CHECK_MATH_SUPPORT
 431 +    GLIBCXX_CHECK_STDLIB_SUPPORT
 432 +    ;;
 433    *-rtems*)
 434      GLIBCXX_CHECK_COMPILER_FEATURES
 435      GLIBCXX_CHECK_LINKER_FEATURES