[cairo] [PATCH] qt: Suppress warnings in qt backend build
Bryce Harrington
bryce at osg.samsung.com
Thu Sep 11 12:54:47 PDT 2014
On Fri, Sep 05, 2014 at 12:15:02PM +0530, Ravi Nanjundappa wrote:
> This patch fixes majorly 2 kinds of warning issues:
>
> (1)
> cc1plus: warning: command line option '-Wold-style-definition' is valid for Ada/C/ObjC but not for C++ [enabled by default]
> cc1plus: warning: command line option '-Wdeclaration-after-statement' is valid for C/ObjC but not for C++ [enabled by default]
> cc1plus: warning: command line option '-Wnested-externs' is valid for C/ObjC but not for C++ [enabled by default]
> cc1plus: warning: command line option '-Wstrict-prototypes' is valid for Ada/C/ObjC but not for C++ [enabled by default]
> cc1plus: warning: command line option '-Wmissing-prototypes' is valid for Ada/C/ObjC but not for C++ [enabled by default]
> cc1plus: warning: command line option '-Wbad-function-cast' is valid for C/ObjC but not for C++ [enabled by default]
>
> Solution: Enable these warnings only for C compiler and not for C++
>
> (2)
> cairo-qt-surface.cpp: In function 'cairo_int_status_t _cairo_qt_surface_fill(void*, cairo_operator_t, const cairo_pattern_t*, const cairo_path_fixed_t*, cairo_fill_rule_t, double, cairo_antialias_t, const cairo_clip_t*)':
> cairo-qt-surface.cpp:852:5: warning: inlining failed in call to 'PatternToBrushConverter::PatternToBrushConverter(const cairo_pattern_t*)': --param max-inline-insns-single limit reached [-Winline]
> cairo-qt-surface.cpp:1339:38: warning: called from here [-Winline]
> cairo-qt-surface.cpp:390:1: warning: inlining failed in call to 'QPainterPath _ZL10path_to_qtPK17_cairo_path_fixedPK13_cairo_matrix.part.13()': call is unlikely and code size would grow [-Winline]
> cairo-qt-surface.cpp:1306:1: warning: called from here [-Winline]
> cairo-qt-surface.cpp:1051:5: warning: inlining failed in call to 'PatternToBrushConverter::~PatternToBrushConverter()': call is unlikely and code size would grow [-Winline]
>
> Solution: Add __attribute__ ((noinline)) to the function as mentioned in
> http://stackoverflow.com/questions/11724235/warning-for-template-with-g-o2-or-os-o-o1 (Edit 3)
>
> Signed-off-by: Ravi Nanjundappa <nravi.n at samsung.com>
Reviewed-by: Bryce Harrington <b.harrington at samsung.com>
Thanks, merged after fixing a couple minor ws issues.
$ git am ../cairo_PATCH_qt_Suppress_warnings_in_qt_backend_build.mbox
Applying: qt: Suppress warnings in qt backend build
/home/bryce/src/Cairo/cairo/.git/rebase-apply/patch:20: trailing
whitespace.
-Wpointer-arith -Wwrite-strings -Wsign-compare -Wpacked
/home/bryce/src/Cairo/cairo/.git/rebase-apply/patch:69: trailing
whitespace.
PatternToBrushConverter (const cairo_pattern_t *pattern)
warning: 2 lines add whitespace errors.
> ---
> build/configure.ac.warnings | 13 +++++++------
> src/cairo-qt-surface.cpp | 9 ++++++---
> 2 files changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/build/configure.ac.warnings b/build/configure.ac.warnings
> index 2c4e34d..8aeae3b 100644
> --- a/build/configure.ac.warnings
> +++ b/build/configure.ac.warnings
> @@ -11,16 +11,17 @@ dnl MAYBE_WARN in an ignorable way (like adding whitespace)
> # -Wlogical-op causes too much noise from strcmp("literal", str)
>
> MAYBE_WARN="-Wall -Wextra \
> --Wold-style-definition -Wdeclaration-after-statement \
> -Wmissing-declarations -Werror-implicit-function-declaration \
> --Wnested-externs -Wpointer-arith -Wwrite-strings \
> --Wsign-compare -Wstrict-prototypes -Wmissing-prototypes \
> --Wpacked -Wswitch-enum -Wmissing-format-attribute \
> --Wbad-function-cast -Wvolatile-register-var \
> +-Wpointer-arith -Wwrite-strings -Wsign-compare -Wpacked
> +-Wswitch-enum -Wmissing-format-attribute -Wvolatile-register-var \
> -Wstrict-aliasing=2 -Winit-self -Wunsafe-loop-optimizations \
> -Wno-missing-field-initializers -Wno-unused-parameter \
> -Wno-attributes -Wno-long-long -Winline"
>
> +MAYBE_C_SPECIFIC_WARN="-Wold-style-definition \
> +-Wdeclaration-after-statement -Wstrict-prototypes \
> +-Wmissing-prototypes -Wbad-function-cast -Wnested-externs"
> +
> # New -Wno options should be added here
> # gcc-4.4 and later accept every -Wno- option but may complain later that this
> # option is unknow each time another warning happen.
> @@ -66,7 +67,7 @@ AC_CACHE_CHECK([for supported warning flags], cairo_cv_warn_cflags, [
> CAIRO_CC_TRY_FLAG([-W$W -Wno-$W],, [WARN_CFLAGS="$WARN_CFLAGS -Wno-$W"])
> done
> cairo_cv_warn_cflags=$WARN_CFLAGS
> - cairo_cv_warn_maybe=$MAYBE_WARN
> + cairo_cv_warn_maybe="$MAYBE_WARN $MAYBE_C_SPECIFIC_WARN"
>
> AC_MSG_CHECKING([which warning flags were supported])
> ])
> diff --git a/src/cairo-qt-surface.cpp b/src/cairo-qt-surface.cpp
> index ce05dba..3034e56 100644
> --- a/src/cairo-qt-surface.cpp
> +++ b/src/cairo-qt-surface.cpp
> @@ -306,6 +306,8 @@ _qimage_format_from_cairo_format (cairo_format_t fmt)
> #else
> return QImage::Format_MonoLSB;
> #endif
> + case CAIRO_FORMAT_RGB30:
> + return QImage::Format_Mono;
> }
>
> return QImage::Format_Mono;
> @@ -386,7 +388,7 @@ _cairo_path_to_qpainterpath_close_path (void *closure)
> return CAIRO_STATUS_SUCCESS;
> }
>
> -static inline QPainterPath
> +static QPainterPath
> path_to_qt (const cairo_path_fixed_t *path,
> const cairo_matrix_t *ctm_inverse = NULL)
> {
> @@ -849,7 +851,8 @@ _cairo_qt_surface_set_clip (cairo_qt_surface_t *qs,
> */
>
> struct PatternToBrushConverter {
> - PatternToBrushConverter (const cairo_pattern_t *pattern) :
> + PatternToBrushConverter (const cairo_pattern_t *pattern)
> + __attribute__ ((noinline)) :
> mAcquiredImageParent(0),
> mAcquiredImage(0),
> mAcquiredImageExtra(0)
> @@ -1048,7 +1051,7 @@ struct PatternToBrushConverter {
> }
> }
>
> - ~PatternToBrushConverter () {
> + ~PatternToBrushConverter () __attribute__ ((noinline)){
> if (mAcquiredImageParent)
> _cairo_surface_release_source_image (mAcquiredImageParent, mAcquiredImage, mAcquiredImageExtra);
> }
> --
> 1.7.9.5
>
> --
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