commit 97c9ced70ac364f7067fc088b90184ab77c9ecd9
Author: Nick Mathewson <nickm(a)torproject.org>
Date: Fri Dec 21 09:49:33 2018 -0500
Try @warning_flags to avoid bloating verbose make logs
We now accumulate warning flags in a separate variable,
"TOR_WARNING_FLAGS", and write it to a "warning_flags" file. Then
we test whether the compiler will accept "@warning_flags": if so, we
put "@warning_flags" in the CFLAGS; if not, we copy the contents of
"$TOR_WARNING_FLAGS" into the CFLAGS.
Closes ticket 28924.
---
.gitignore | 3 +++
configure.ac | 38 +++++++++++++++++++++++++++++---------
warning_flags.in | 1 +
3 files changed, 33 insertions(+), 9 deletions(-)
diff --git a/.gitignore b/.gitignore
index cedff8fb3..f1ce903a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -72,9 +72,12 @@ uptime-*.json
/mkinstalldirs
/Tor*Bundle.dmg
/tor-*-win32.exe
+/warning_flags
+
/coverage_html/
/callgraph/
+
# /contrib/
/contrib/dist/tor.sh
/contrib/dist/torctl
diff --git a/configure.ac b/configure.ac
index 1d4c31f86..d992b8d01 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2129,6 +2129,8 @@ case "$host_os" in
LDFLAGS="$LDFLAGS -dead_strip" ;;
esac
+TOR_WARNING_FLAGS=""
+
# Add some more warnings which we use in development but not in the
# released versions. (Some relevant gcc versions can't handle these.)
#
@@ -2146,6 +2148,8 @@ if test "x$enable_gcc_warnings_advisory" != "xno"; then
CFLAGS="$CFLAGS -Wno-system-headers" ;;
esac
+ CFLAGS_NOWARNINGS="$CFLAGS"
+
# GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
# have it work better.
# CFLAGS="$CFLAGS -Wstrict-overflow=1"
@@ -2361,7 +2365,9 @@ if test "x$enable_gcc_warnings_advisory" != "xno"; then
-Wvisibility
-Wvla-extension
-Wzero-length-array
- ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
+ ], [ TOR_TRY_COMPILE_WITH_CFLAGS(warning_flag, [],
+ [TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS warning_flag" CFLAGS="$CFLAGS warning_flag"], true)
+ ])
dnl We should re-enable this in some later version. Clang doesn't
dnl mind, but it causes trouble with GCC.
@@ -2375,16 +2381,19 @@ dnl -Wthread-safety-attributes
dnl -Wthread-safety-beta
dnl -Wthread-safety-precise
- CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
- CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
- CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
- CFLAGS="$CFLAGS -Wwrite-strings"
- CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
- CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
- CFLAGS="$CFLAGS -Wunused-parameter "
+ W_FLAGS="$W_FLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
+ W_FLAGS="$W_FLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
+ W_FLAGS="$W_FLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
+ W_FLAGS="$W_FLAGS -Wwrite-strings"
+ W_FLAGS="$W_FLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
+ W_FLAGS="$W_FLAGS -Waggregate-return -Wpacked -Wunused"
+ W_FLAGS="$W_FLAGS -Wunused-parameter "
# These interfere with building main() { return 0; }, which autoconf
# likes to use as its default program.
- CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
+ W_FLAGS="$W_FLAGS -Wold-style-definition -Wmissing-declarations"
+
+ TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS $W_FLAGS"
+ CFLAGS="$CFLAGS $W_FLAGS"
if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
@@ -2396,6 +2405,8 @@ dnl -Wthread-safety-precise
AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
fi
+ CFLAGS="$CFLAGS_NOWARNINGS"
+
if test "x$enable_fatal_warnings" = "xyes"; then
# I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
# default autoconf programs are full of errors.
@@ -2404,6 +2415,14 @@ dnl -Wthread-safety-precise
fi
+AC_SUBST(TOR_WARNING_FLAGS)
+
+echo "$TOR_WARNING_FLAGS">warning_flags
+
+TOR_TRY_COMPILE_WITH_CFLAGS([@warning_flags], [],
+ CFLAGS="$CFLAGS @warning_flags",
+ CFLAGS="$CFLAGS $TOR_WARNING_FLAGS")
+
if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
case "$host_os" in
darwin*)
@@ -2427,6 +2446,7 @@ AC_CONFIG_FILES([
src/rust/.cargo/config
scripts/maint/checkOptionDocs.pl
scripts/maint/updateVersions.pl
+ warning_flags
])
if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
diff --git a/warning_flags.in b/warning_flags.in
new file mode 100644
index 000000000..e8ebe6e9a
--- /dev/null
+++ b/warning_flags.in
@@ -0,0 +1 @@
+@TOR_WARNING_FLAGS@
\ No newline at end of file