ef8d1a2af8
debug build (using -g and disabling all -O options), but also sets a whole range of picky/strict compiler options depending on what compiler and version that is used. This function is ripped right off the curl configure script, written by yours truly. I left it using the same name as in the curl script to 1) make it obvious where it comes from, so that 2) it will be easier to update and keep it in sync with future modifications. Now, this shows MAAAAAAAAANY warnings...
150 lines
4.7 KiB
Plaintext
150 lines
4.7 KiB
Plaintext
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dnl **********************************************************************
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dnl CURL_DETECT_ICC ([ACTION-IF-YES])
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dnl
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dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES
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dnl sets the $ICC variable to "yes" or "no"
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dnl **********************************************************************
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AC_DEFUN([CURL_DETECT_ICC],
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[
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ICC="no"
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AC_MSG_CHECKING([for icc in use])
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if test "$GCC" = "yes"; then
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dnl check if this is icc acting as gcc in disguise
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AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER],
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dnl action if the text is found, this it has not been replaced by the
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dnl cpp
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ICC="no",
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dnl the text was not found, it was replaced by the cpp
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ICC="yes"
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AC_MSG_RESULT([yes])
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[$1]
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)
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fi
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if test "$ICC" = "no"; then
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# this is not ICC
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AC_MSG_RESULT([no])
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fi
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])
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dnl We create a function for detecting which compiler we use and then set as
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dnl pendantic compiler options as possible for that particular compiler. The
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dnl options are only used for debug-builds.
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AC_DEFUN([CURL_CC_DEBUG_OPTS],
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[
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if test "z$ICC" = "z"; then
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CURL_DETECT_ICC
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fi
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if test "$GCC" = "yes"; then
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dnl figure out gcc version!
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AC_MSG_CHECKING([gcc version])
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gccver=`$CC -dumpversion`
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num1=`echo $gccver | cut -d . -f1`
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num2=`echo $gccver | cut -d . -f2`
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gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null`
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AC_MSG_RESULT($gccver)
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if test "$ICC" = "yes"; then
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dnl this is icc, not gcc.
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dnl ICC warnings we ignore:
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dnl * 269 warns on our "%Od" printf formatters for curl_off_t output:
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dnl "invalid format string conversion"
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dnl * 279 warns on static conditions in while expressions
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dnl * 981 warns on "operands are evaluated in unspecified order"
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dnl * 1418 "external definition with no prior declaration"
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dnl * 1419 warns on "external declaration in primary source file"
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dnl which we know and do on purpose.
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WARN="-wd279,269,981,1418,1419"
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if test "$gccnum" -gt "600"; then
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dnl icc 6.0 and older doesn't have the -Wall flag
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WARN="-Wall $WARN"
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fi
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else dnl $ICC = yes
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dnl this is a set of options we believe *ALL* gcc versions support:
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WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes"
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dnl -Wcast-align is a bit too annoying on all gcc versions ;-)
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if test "$gccnum" -ge "207"; then
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dnl gcc 2.7 or later
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WARN="$WARN -Wmissing-declarations"
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fi
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if test "$gccnum" -gt "295"; then
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dnl only if the compiler is newer than 2.95 since we got lots of
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dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
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dnl gcc 2.95.4 on FreeBSD 4.9!
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WARN="$WARN -Wundef -Wno-long-long -Wsign-compare"
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fi
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if test "$gccnum" -ge "296"; then
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dnl gcc 2.96 or later
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WARN="$WARN -Wfloat-equal"
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fi
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if test "$gccnum" -gt "296"; then
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dnl this option does not exist in 2.96
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WARN="$WARN -Wno-format-nonliteral"
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fi
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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if test "$gccnum" -ge "303"; then
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dnl gcc 3.3 and later
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WARN="$WARN -Wendif-labels -Wstrict-prototypes"
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fi
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if test "$gccnum" -ge "304"; then
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# try these on gcc 3.4
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WARN="$WARN -Wdeclaration-after-statement"
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fi
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for flag in $CPPFLAGS; do
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case "$flag" in
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-I*)
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dnl Include path, provide a -isystem option for the same dir
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dnl to prevent warnings in those dirs. The -isystem was not very
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dnl reliable on earlier gcc versions.
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add=`echo $flag | sed 's/^-I/-isystem /g'`
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WARN="$WARN $add"
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;;
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esac
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done
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fi dnl $ICC = no
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CFLAGS="$CFLAGS $WARN"
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AC_MSG_NOTICE([Added this set of compiler options: $WARN])
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else dnl $GCC = yes
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AC_MSG_NOTICE([Added no extra compiler options])
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fi dnl $GCC = yes
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dnl strip off optimizer flags
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NEWFLAGS=""
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for flag in $CFLAGS; do
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case "$flag" in
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-O*)
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dnl echo "cut off $flag"
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;;
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*)
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NEWFLAGS="$NEWFLAGS $flag"
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;;
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esac
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done
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CFLAGS=$NEWFLAGS
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]) dnl end of AC_DEFUN()
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