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configure: Be more verbose when compiler sanity checks fail

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When configure could not get past initial compiler sanity check
the user was left with no explanation why this happened (usually
the reason is that compilers are not installed).

By printing the executed command line and re-executing it without
output redirection user gets better information how to proceed
(or ask for help) to resolve this problem.

The shell builtin 'printf' is used to print the executed command
line to ensure verbatim output.
This commit is contained in:
Tomi Ollila 2017-04-08 22:23:32 +03:00 committed by David Bremner
parent e08f5f76e4
commit 807a9cb8aa
1 changed files with 9 additions and 2 deletions
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11
configure vendored
View file

@ -322,22 +322,29 @@ errors=0
printf "int main(void){return 0;}\n" > minimal.c
printf "Sanity checking C compilation environment... "
if ${CC} ${CFLAGS} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal > /dev/null 2>&1
test_cmdline="${CC} ${CFLAGS} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal"
if ${test_cmdline} > /dev/null 2>&1
then
printf "OK.\n"
else
printf "Fail.\n"
errors=$((errors + 1))
printf Executed:; printf ' %s' ${test_cmdline}; echo
${test_cmdline}
fi
printf "Sanity checking C++ compilation environment... "
if ${CXX} ${CXXFLAGS_for_sh} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal > /dev/null 2>&1
test_cmdline="${CXX} ${CXXFLAGS_for_sh} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal"
if ${test_cmdline} > /dev/null 2>&1
then
printf "OK.\n"
else
printf "Fail.\n"
errors=$((errors + 1))
printf Executed:; printf ' %s' ${test_cmdline}; echo
${test_cmdline}
fi
unset test_cmdline
if [ $errors -gt 0 ]; then
cat <<EOF