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autotools: Require GNU sort

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find_lib() uses sort -V, which is a GNU extension. Users of non-GNU
operating systems should either install GNU coreutils (assumed to
provide a gsort executable), or use the CMake build system.

Resolves: https://github.com/libsdl-org/SDL/issues/6106
Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Simon McVittie 2022-08-25 14:44:43 +01:00 committed by Sam Lantinga
parent b188a916ff
commit 732e1530e3
1 changed files with 4 additions and 1 deletions
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5
configure.ac
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@ -70,6 +70,9 @@ if [ test -z "$AWK" ]; then
AC_MSG_ERROR([*** awk not found, aborting])
fi
AC_CHECK_PROGS([SORT], [gsort sort], [false])
AS_IF([! "$SORT" -V </dev/null >/dev/null], [AC_MSG_ERROR([GNU sort(1) is required])])
dnl 64-bit file offsets if possible unless --disable-largefile is specified
AC_SYS_LARGEFILE
@ -186,7 +189,7 @@ find_lib()
host_lib_path="/usr/$base_libdir /usr/local/$base_libdir"
fi
for path in $env_lib_path $gcc_bin_path $gcc_lib_path $host_lib_path; do
lib=[`ls -- $path/$1 2>/dev/null | sed 's,.*/,,' | sort -V -r | $AWK 'BEGIN{FS="."}{ print NF, $0 }' | sort -n -s | sed 's,[0-9]* ,,' | head -1`]
lib=[`ls -- $path/$1 2>/dev/null | sed 's,.*/,,' | "$SORT" -V -r | $AWK 'BEGIN{FS="."}{ print NF, $0 }' | "$SORT" -n -s | sed 's,[0-9]* ,,' | head -1`]
if test x$lib != x; then
echo $lib
return