bac2d8a246
As of recent commit 8bf0ee8d62
"Fortran: Add transfer_between_remotes [PR107635]", we've got 'alloca' usage
in 'libgfortran/caf/single.c:_gfortran_caf_transfer_between_remotes', and
the libgfortran target library fails to build for legacy configurations where
PTX 'alloca' is not available:
../../../../source-gcc/libgfortran/caf/single.c: In function ‘_gfortran_caf_transfer_between_remotes’:
../../../../source-gcc/libgfortran/caf/single.c:675:23: sorry, unimplemented: dynamic stack allocation not supported
675 | transfer_desc = __builtin_alloca (desc_size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../source-gcc/libgfortran/caf/single.c:680:20: sorry, unimplemented: dynamic stack allocation not supported
680 | transfer_ptr = __builtin_alloca (*opt_dst_charlen * src_size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[6]: *** [Makefile:4675: caf/single.lo] Error 1
With '-mfake-ptx-alloca', libgfortran again succeeds to build, and compared
to before, we've got only a small number of regressions due to nvptx 'ld'
complaining about 'unresolved symbol __GCC_nvptx__PTX_alloca_not_supported':
[-PASS:-]{+FAIL:+} gfortran.dg/coarray/codimension_2.f90 -fcoarray=lib -O2 -lcaf_single (test for excess errors)
[-PASS:-]{+FAIL:+} gfortran.dg/coarray/event_4.f08 -fcoarray=lib -O2 -lcaf_single (test for excess errors)
[-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/event_4.f08 -fcoarray=lib -O2 -lcaf_single [-execution test-]{+compilation failed to produce executable+}
[-PASS:-]{+FAIL:+} gfortran.dg/coarray/fail_image_2.f08 -fcoarray=lib -O2 -lcaf_single (test for excess errors)
[-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/fail_image_2.f08 -fcoarray=lib -O2 -lcaf_single [-execution test-]{+compilation failed to produce executable+}
[-PASS:-]{+FAIL:+} gfortran.dg/coarray/proc_pointer_assign_1.f90 -fcoarray=lib -O2 -lcaf_single (test for excess errors)
[-PASS:-]{+UNRESOLVED:+} gfortran.dg/coarray/proc_pointer_assign_1.f90 -fcoarray=lib -O2 -lcaf_single [-execution test-]{+compilation failed to produce executable+}
[-PASS:-]{+FAIL:+} gfortran.dg/coarray_43.f90 -O (test for excess errors)
That's acceptable for such legacy PTX configurations.
PR target/107635
libgfortran/
* config/t-nvptx: New.
* configure.host [nvptx] (tmake_file): Add it.
102 lines
2 KiB
Text
102 lines
2 KiB
Text
# configure.host
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#
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# This shell script handles all host based configuration for libgfortran.
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# It sets various shell variables based on the host triplet.
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# You can modify this shell script without rerunning autoconf/aclocal/etc.
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# This file is "sourced", not executed.
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#
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#
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# It uses the following shell variables as set by config.guess:
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# host The configuration host (full CPU-vendor-OS triplet)
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# host_cpu The configuration host CPU
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# host_os The configuration host OS
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#
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#
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# It sets the following shell variables:
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#
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# fpu_host FPU-specific code file, defaults to fpu-generic.
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# tmake_file A list of machine-description-specific
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# makefile fragments.
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# DEFAULTS
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fpu_host='fpu-generic'
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ieee_support='no'
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if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
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fpu_host='fpu-aix'
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ieee_support='yes'
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fi
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if test "x${have_fpsetmask}" = "xyes"; then
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fpu_host='fpu-sysv'
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ieee_support='yes'
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fi
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if test "x${have_feenableexcept}" = "xyes"; then
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fpu_host='fpu-glibc'
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ieee_support='yes'
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fi
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case "${host_cpu}" in
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# x86 asm should be used instead of glibc, since glibc doesn't support
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# the x86 denormal exception.
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i?86 | x86_64)
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if test "x${have_soft_float}" = "xyes"; then
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fpu_host='fpu-generic'
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ieee_support='no'
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else
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fpu_host='fpu-387'
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ieee_support='yes'
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fi
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;;
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# use asm on aarch64-darwin
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aarch64)
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case "${host_os}" in
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darwin*)
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fpu_host='fpu-aarch64'
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ieee_support='yes'
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;;
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esac
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;;
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powerpc*)
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case "${host_os}" in
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darwin*)
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fpu_host='fpu-macppc'
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ieee_support='yes'
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;;
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esac
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esac
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# Some targets require additional compiler options for NaN/Inf.
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ieee_flags=
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case "${host_cpu}" in
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alpha*)
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ieee_flags="-mieee" ;;
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sh*)
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ieee_flags="-mieee" ;;
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esac
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tmake_file=
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# Other system configury
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case "${target}" in
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*-*-aix*)
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# Create AIX-style "FAT" libraries.
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tmake_file="t-aix"
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;;
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nvptx-*-none)
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tmake_file="$tmake_file t-nvptx"
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;;
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*)
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;;
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esac
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