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https://github.com/moparisthebest/curl
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Enable more GCC warnings
This enables the following additional warnings: -Wold-style-definition -Warray-bounds=2 instead of the default 1 -Wformat=2, but only for GCC 4.8+ as Wno-format-nonliteral is not respected for older versions -Wunused-const-variable, which enables level 2 instead of the default 1 -Warray-bounds also in debug mode through -ftree-vrp -Wnull-dereference also in debug mode through -fdelete-null-pointer-checks Closes https://github.com/curl/curl/pull/2747
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@ -1012,6 +1012,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
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dnl Only gcc 3.4 or later
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if test "$compiler_num" -ge "304"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement"
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tmp_CFLAGS="$tmp_CFLAGS -Wold-style-definition"
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fi
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#
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dnl Only gcc 4.0 or later
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@ -1030,6 +1031,8 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-parameter-type -Wempty-body"
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tmp_CFLAGS="$tmp_CFLAGS -Wclobbered -Wignored-qualifiers"
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tmp_CFLAGS="$tmp_CFLAGS -Wconversion -Wno-sign-conversion -Wvla"
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dnl required for -Warray-bounds, included in -Wall
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tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp"
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fi
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#
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dnl Only gcc 4.5 or later
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@ -1045,12 +1048,23 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
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tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
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fi
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#
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dnl only gcc 4.8 or later
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if test "$compiler_num" -ge "408"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
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fi
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#
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dnl Only gcc 5 or later
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if test "$compiler_num" -ge "500"; then
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tmp_CFLAGS="$tmp_CFLAGS -Warray-bounds=2"
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fi
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#
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dnl Only gcc 6 or later
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if test "$compiler_num" -ge "600"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wshift-negative-value"
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tmp_CFLAGS="$tmp_CFLAGS -Wshift-overflow=2"
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tmp_CFLAGS="$tmp_CFLAGS -Wnull-dereference"
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tmp_CFLAGS="$tmp_CFLAGS -Wnull-dereference -fdelete-null-pointer-checks"
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tmp_CFLAGS="$tmp_CFLAGS -Wduplicated-cond"
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tmp_CFLAGS="$tmp_CFLAGS -Wunused-const-variable"
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fi
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#
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dnl Only gcc 7 or later
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