mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
5f113eac84
Code cleanup
Description:
Get ready for adding C99 extensions sometime in the future.
Solution:
Added some comments to the gcc flags..
Platforms tested:
Linux (eirene), FreeBSD 4.3 (hawkwind)
217 lines
6.1 KiB
Bash
217 lines
6.1 KiB
Bash
# -*- shell-script -*-
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#
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# This file should be sourced into configure if the compiler is the
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# GNU gcc compiler or a derivative. It is careful not to do anything
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# if the compiler is not GNU; otherwise `cc_flags_set' is set to `yes'
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#
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# Get the compiler version in a way that works for gcc, egcs, and
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# pgcc unless a compiler version is already known
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#
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# cc_vendor: The compiler name: gcc, egcs, or pgcc
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# cc_version: Version number: 2.91.60, 2.7.2.1
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#
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if test X = "X$cc_flags_set"; then
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cc_version="`$CC $CFLAGS -v 2>&1 |grep 'gcc version' |\
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sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
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cc_vendor=`echo $cc_version |sed 's/\([a-z]*\).*/\1/'`
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cc_version=`echo $cc_version |sed 's/[-a-z]//g'`
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if test X = "X$cc_vendor" -a X != "X$cc_version"; then
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cc_vendor=gcc
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fi
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if test "-" != "$cc_vendor-$cc_version"; then
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echo "compiler '$CC' is GNU $cc_vendor-$cc_version"
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fi
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# Some version numbers
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cc_vers_major=`echo $cc_version | cut -f1 -d.`
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cc_vers_minor=`echo $cc_version | cut -f2 -d.`
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cc_vers_patch=`echo $cc_version | cut -f3 -d.`
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test -n "$cc_vers_major" || cc_vers_major=0
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test -n "$cc_vers_minor" || cc_vers_minor=0
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test -n "$cc_vers_patch" || cc_vers_patch=0
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cc_vers_all=`expr $cc_vers_major '*' 1000000 + $cc_vers_minor '*' 1000 + $cc_vers_patch`
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fi
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# GCC compilers before gcc-2.8.1 have problems with `long long'.
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if test gcc = $cc_vendor -a $cc_vers_all -lt 2008001; then
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cat <<EOF
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**
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** This compiler may be unable to properly compile the long long
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** data type used extensively by hdf5, although specifying
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** --disable-hsizet for configure may work around those bugs.
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** There may be other code generation problems also, especially
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** when optimizations are enabled. Please upgrade to at least GNU
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** gcc version 2.8.1 before reporting bugs to the HDF5 team.
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**
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EOF
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sleep 5
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# Current EGCS compilers have problems with `long long' and register
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# allocation when optimizations are turned on for x86 systems.
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elif test egcs = $cc_vendor -a $cc_vers_all -le 2091066; then
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if test "$HSIZET" != "large"; then
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cat <<EOF
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**
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** This compiler may have problems allocating registers when
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** optimizations are enabled on some platforms. Specifying
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** --disable-hsizet usually avoids the bug.
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**
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EOF
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sleep 5
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fi
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# All current versions of PGCC have problems also.
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elif test pgcc = $cc_vendor -a $cc_vers_all -le 2091066; then
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cat <<EOF
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**
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** This compiler may have problems allocating registers for long
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** long data types when optimizations are enabled. There may be
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** other code generation problems as well. We know of no version
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** of pgcc which is capable of compiling HDF5 in production mode.
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** Please use gcc-2.8 or egcs-1.1.1 before reporting bugs.
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**
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EOF
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sleep 5
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fi
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# Architecture-specific flags
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case "$host_os-$host_cpu" in
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# FreeBSD sets the information from "hostname -m" to the general machine
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# architecture, not the specific CPU for the machine, so even our
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# Pentium II Xeon server is set to "i386". Once we know we are on a FreeBSD
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# machine, use the "sysctl" command to get the CPU hardware model.
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freebsd*)
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host_cpu_model=`sysctl -n hw.model`
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case "$host_cpu_model" in
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# Hmm.. this might not catch Celerons, but it won't hurt them either...
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*Pro*|*II*)
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# This check should be kept in sync with the *-i686 check below
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case "$cc_vendor-$cc_version" in
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gcc-2.95*)
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ARCH=${ARCH:="-march=i686 -malign-double"}
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;;
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gcc-*|egcs-*|pgcc-*)
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ARCH=${ARCH:="-mcpu=pentiumpro -march=pentiumpro -malign-double"}
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;;
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esac
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;;
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esac
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;;
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*-i686)
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case "$cc_vendor-$cc_version" in
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gcc-2.9[56]*)
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ARCH=${ARCH:="-march=i686 -malign-double"}
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;;
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gcc-*|egcs-*|pgcc-*)
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ARCH=${ARCH:="-mcpu=pentiumpro -march=pentiumpro -malign-double"}
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;;
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esac
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;;
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esac
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# Host-specific flags
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case "`hostname`" in
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hawkwind.ncsa.uiuc.edu)
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ARCH="$ARCH -pipe"
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;;
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esac
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# Common GCC flags for various situations
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case "$cc_vendor-$cc_version" in
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gcc*|egcs*|pgcc*)
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# General
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CFLAGS="$CFLAGS $ARCH -ansi -pedantic -Wchar-subscripts -Wall -W -Wshadow -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wpointer-arith -Wconversion -Wredundant-decls"
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# Production
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PROD_CFLAGS="-O2 $NOFP -finline-functions"
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PROD_CPPFLAGS=
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# Debug
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DEBUG_CFLAGS="-g -fverbose-asm"
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DEBUG_CPPFLAGS=
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# Profile
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PROFILE_CFLAGS=-pg
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PROFILE_CPPFLAGS=
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;;
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esac
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# Version specific GCC flags
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case "$cc_vendor-$cc_version" in
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gcc-2.7*)
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# No changes from default GCC flags...
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# Flags are set
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cc_flags_set=yes
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;;
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gcc-2.8.*)
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# General
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CFLAGS="$CFLAGS $ARCH -Wsign-compare"
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# Production
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PROD_CFLAGS="$PROD_CFLAGS -fschedule-insns2"
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# Flags are set
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cc_flags_set=yes
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;;
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gcc-2.95.[3456789])
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# Start using the C99 Standard's extensions (long long, etc.)
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# (Not quite yet... -QAK)
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# General
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#CFLAGS="$CFLAGS -std=c9x"
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# Flags are set
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cc_flags_set=yes
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;;
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gcc-2.95.[12])
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# No changes from default GCC flags...
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# Flags are set
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cc_flags_set=yes
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;;
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egcs-2.*|pgcc-2.*)
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# General
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CFLAGS="$CFLAGS $ARCH -Wsign-compare"
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# Production
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PROD_CFLAGS="-O6 $NOFP"
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# Flags are set
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cc_flags_set=yes
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;;
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gcc-*|egcs-*|pgcc-*)
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# This must be some other GNU compiler that we don't know about.
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# Just use fairly generic flags.
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# Production
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PROD_CFLAGS=-O
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PROD_CPPFLAGS=
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# Debug
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DEBUG_CFLAGS=-g
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DEBUG_CPPFLAGS=
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# Profile
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PROFILE_CFLAGS=-pg
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PROFILE_CPPFLAGS=
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# Flags are set
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cc_flags_set=yes
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;;
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esac
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# Clear cc info if no flags set
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if test X = "X$cc_flags_set"; then
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cc_vendor=
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cc_version=
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fi
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