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build: Factor out a more pliable CAIRO_CC_TRY_LINK_WITH_ENV_SILENT.

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Introduce a new CAIRO_CC_TRY_LINK_WITH_ENV_SILENT macro for running
generic link tests with arbitrary CFLAGS/LIBS/LDFLAGS and no muttering
of autoconf messages.  Rewrite the previous CAIRO_CC_TRY_FLAG in terms
of it.
This commit is contained in:
M Joonas Pihlaja 2010-06-27 01:11:13 +03:00
parent 120b78ada7
commit d2f5592e0e
1 changed files with 25 additions and 6 deletions
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31
build/aclocal.cairo.m4
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@ -75,10 +75,18 @@ AC_DEFUN([CAIRO_CONFIG_COMMANDS],
], $3)
])
dnl check compiler flags with a program and no muttering.
AC_DEFUN([CAIRO_CC_TRY_FLAG_SILENT],
[dnl (flags..., optional program, true-action, false-action)
dnl CAIRO_CC_TRY_LINK_WITH_ENV_SILENT(env-setup, program,
dnl true-action, false-action)
dnl
dnl Compile and link the program with the given environment setup.
dnl The global cairo_cc_flag is set to "yes" or "no" according as
dnl the link succeeded or not. The link step must complete without
dnl warnings or errors to stderr.
dnl
dnl Perform true-action on success and false-action on failure.
dnl The values of CFLAGS, LIBS, LDFLAGS are saved before env-setup
dnl is executed and restored right before the end of the macro.
AC_DEFUN([CAIRO_CC_TRY_LINK_WITH_ENV_SILENT],[dnl
# AC_LANG_PROGRAM() produces a main() w/o args,
# but -Wold-style-definition doesn't like that.
# We need _some_ program so that we don't get
@ -88,14 +96,15 @@ AC_DEFUN([CAIRO_CC_TRY_FLAG_SILENT],
int main(int c, char **v) { (void)c; (void)v; return 0; }'
_save_cflags="$CFLAGS"
CFLAGS="$CFLAGS $1"
_save_ldflags="$LDFLAGS"
_save_libs="$LIBS"
$1
AC_LINK_IFELSE(
[$_compile_program],
[cairo_cc_stderr=`test -f conftest.err && cat conftest.err`
cairo_cc_flag=yes],
[cairo_cc_stderr=`test -f conftest.err && cat conftest.err`
cairo_cc_flag=no])
CFLAGS="$_save_cflags"
if test "x$cairo_cc_stderr" != "x"; then
cairo_cc_flag=no
@ -106,6 +115,16 @@ AC_DEFUN([CAIRO_CC_TRY_FLAG_SILENT],
else
ifelse([$4], , :, [$4])
fi
CFLAGS="$_save_cflags"
LDFLAGS="$_save_ldflags"
LIBS="$_save_libs"
])
dnl check compiler flags with a program and no muttering.
AC_DEFUN([CAIRO_CC_TRY_FLAG_SILENT],
[dnl (flags..., optional program, true-action, false-action)
CAIRO_CC_TRY_LINK_WITH_ENV_SILENT([CFLAGS="$CFLAGS $1"],
[$2], [$3], [$4])
])
dnl find a -Werror equivalent