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Merged
frangarcj merged 1 commit into from
Aug 28, 2026
Merged

Try a named GNU mirror before the redirector #183

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21 changes: 16 additions & 5 deletions cmake/Components.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -4,18 +4,24 @@ include_guard(GLOBAL)
# hashes together so version updates cannot accidentally mix artifacts.
set(GCC_VERSION 15.2.0)
set(GCC_HASH SHA256=438fd996826b0c82485a29da03a72d71d6e3541a83ec702df4271f6fe025d24e)
# Everything below that GNU hosts is named twice: ftpmirror.gnu.org first,
# which is GNU's own redirector to a nearby mirror, and ftp.gnu.org after it.
# ExternalProject tries them in order and URL_HASH decides whether what came
# back is the right bytes, so a mirror serving something else fails the same
# way a corrupt download does.
# Everything below that GNU hosts is named three times, tried in order:
# mirrors.kernel.org, then ftpmirror.gnu.org, then ftp.gnu.org. URL_HASH
# decides whether what came back is the right bytes, so a mirror serving
# something else fails the way a corrupt download does.
#
# One host was one host too few. ftp.gnu.org refused connections for over two
# minutes at a time through 26 and 27 August, and each time it took a whole
# build with it -- six components come from there, and gdb is downloaded by
# every host.
#
# Two was also too few, for a different reason: ftpmirror.gnu.org is a
# redirector to whichever mirror is near, and the one it picked answered with
# an HTTP error. A named mirror goes first because it is the same host every
# time and can be seen to work; the redirector stays behind it as the thing
# that keeps working when that host does not.

set(GCC_URL
https://mirrors.kernel.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz
https://ftpmirror.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz
https://ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz)

Expand All @@ -34,18 +40,21 @@ set(LIBYAML_URL https://pyyaml.org/download/libyaml/yaml-${LIBYAML_VERSION}.tar.
set(GMP_VERSION 6.3.0)
set(GMP_HASH SHA256=ac28211a7cfb609bae2e2c8d6058d66c8fe96434f740cf6fe2e47b000d1c20cb)
set(GMP_URL
https://mirrors.kernel.org/gnu/gmp/gmp-${GMP_VERSION}.tar.bz2
https://ftpmirror.gnu.org/gnu/gmp/gmp-${GMP_VERSION}.tar.bz2
https://ftp.gnu.org/gnu/gmp/gmp-${GMP_VERSION}.tar.bz2)

set(MPFR_VERSION 4.2.2)
set(MPFR_HASH SHA256=9ad62c7dc910303cd384ff8f1f4767a655124980bb6d8650fe62c815a231bb7b)
set(MPFR_URL
https://mirrors.kernel.org/gnu/mpfr/mpfr-${MPFR_VERSION}.tar.bz2
https://ftpmirror.gnu.org/gnu/mpfr/mpfr-${MPFR_VERSION}.tar.bz2
https://ftp.gnu.org/gnu/mpfr/mpfr-${MPFR_VERSION}.tar.bz2)

set(MPC_VERSION 1.3.1)
set(MPC_HASH SHA256=ab642492f5cf882b74aa0cb730cd410a81edcdbec895183ce930e706c1c759b8)
set(MPC_URL
https://mirrors.kernel.org/gnu/mpc/mpc-${MPC_VERSION}.tar.gz
https://ftpmirror.gnu.org/gnu/mpc/mpc-${MPC_VERSION}.tar.gz
https://ftp.gnu.org/gnu/mpc/mpc-${MPC_VERSION}.tar.gz)

Expand All @@ -61,12 +70,14 @@ set(EXPAT_URL https://github.com/libexpat/libexpat/releases/download/R_2_3_0/exp
set(BINUTILS_VERSION 2.46.1)
set(BINUTILS_HASH SHA256=e127a709cba24c76de8936cb7083dd768f28cd37eb010492e2f19b71eb1294e4)
set(BINUTILS_URL
https://mirrors.kernel.org/gnu/binutils/binutils-${BINUTILS_VERSION}.tar.xz
https://ftpmirror.gnu.org/gnu/binutils/binutils-${BINUTILS_VERSION}.tar.xz
https://ftp.gnu.org/gnu/binutils/binutils-${BINUTILS_VERSION}.tar.xz)

set(GDB_VERSION 15.2)
set(GDB_HASH SHA256=83350ccd35b5b5a0cba6b334c41294ea968158c573940904f00b92f76345314d)
set(GDB_URL
https://mirrors.kernel.org/gnu/gdb/gdb-${GDB_VERSION}.tar.xz
https://ftpmirror.gnu.org/gnu/gdb/gdb-${GDB_VERSION}.tar.xz
https://ftp.gnu.org/gnu/gdb/gdb-${GDB_VERSION}.tar.xz)

Expand Down
16 changes: 12 additions & 4 deletions tests/cmake/gnu-download-mirror.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -16,14 +16,22 @@ include("${repository_root}/cmake/Components.cmake")
foreach(component GCC GMP MPFR MPC BINUTILS GDB)
set(urls "${${component}_URL}")
list(LENGTH urls count)
if(count LESS 2)
if(count LESS 3)
message(SEND_ERROR
"FAIL: ${component}_URL names one host; an outage there is a failed build")
"FAIL: ${component}_URL names ${count} host(s); two outages in a row is a "
"failed build, and both happened on 27 August")
endif()
# ftp.gnu.org is the one that went down, so it is the last resort and not
# the first thing tried.
list(GET urls 0 first)
if(NOT first MATCHES "^https://ftpmirror\\.gnu\\.org/")
if(first MATCHES "^https://ftp\\.gnu\\.org/")
message(SEND_ERROR
"FAIL: ${component}_URL does not try GNU's mirror redirector first: ${first}")
"FAIL: ${component}_URL tries ftp.gnu.org first")
endif()
list(GET urls -1 last)
if(NOT last MATCHES "^https://ftp\\.gnu\\.org/")
message(SEND_ERROR
"FAIL: ${component}_URL does not keep ftp.gnu.org as the last resort: ${last}")
endif()
# And the hash, without which a mirror is somebody else's word for it.
if(NOT DEFINED ${component}_HASH)
Expand Down
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