summaryrefslogtreecommitdiffstats
path: root/config/gnu-flags
blob: 9b619078fcd729b77cc6c2e87771aad2a17cbc23 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
#                            -*- shell-script -*-
#
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the COPYING file, which can be found at the root of the source code
# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
# If you do not have access to either file, you may request a copy from
# help@hdfgroup.org.


# This file should be sourced into configure if the compiler is the
# GNU gcc compiler or a derivative.  It is careful not to do anything
# if the compiler is not GNU; otherwise 'cc_flags_set' is set to 'yes'
#

# Get the compiler version in a way that works for gcc
# unless a compiler version is already known
#
#   cc_vendor:    The compiler name: gcc
#   cc_version:   Version number: 2.91.60, 2.7.2.1
#
if test "X-" = "X-$cc_flags_set"; then
    # PathScale compiler spits out gcc version string too. Need to
    # filter it out.
    # icc beginning with version 12 includes a "gcc version compatiblilty"
    # string, causing the gcc H5_CFLAGS to be erroneously added.  The line
    # "grep -v 'icc version'" causes the discarding of any output
    # containing 'icc version'.  The cc_version for icc is correctly determined
    # and flags added in the intel-flags script.
    cc_version="`$CC $CFLAGS $H5_CFLAGS -v 2>&1 | grep -v 'PathScale' |\
        grep -v 'icc version' |\
        grep 'gcc version' | sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
    cc_vendor=`echo $cc_version |sed 's/\([a-z]*\).*/\1/'`
    cc_version=`echo $cc_version |sed 's/[-a-z]//g'`
    if test X = "X$cc_vendor" -a X != "X$cc_version"; then
        cc_vendor=gcc
    fi
    if test "-" != "$cc_vendor-$cc_version"; then
        echo "compiler '$CC' is GNU $cc_vendor-$cc_version"
    fi

    # Get the compiler version numbers
    cc_vers_major=`echo $cc_version | cut -f1 -d.`
    cc_vers_minor=`echo $cc_version | cut -f2 -d.`
    cc_vers_patch=`echo $cc_version | cut -f3 -d.`
    test -n "$cc_vers_major" || cc_vers_major=0
    test -n "$cc_vers_minor" || cc_vers_minor=0
    test -n "$cc_vers_patch" || cc_vers_patch=0
fi

if test "X-gcc" = "X-$cc_vendor"; then

    ###############################
    # Architecture-specific flags #
    ###############################

    arch=
    case "$host_os-$host_cpu" in
        # FreeBSD sets the information from "uname -m" to the general machine
        # architecture, not the specific CPU for the machine, so even our
        # Pentium II Xeon server is set to "i386".  Once we know we are on a FreeBSD
        # machine, use the "sysctl" command to get the CPU hardware model.
        freebsd*-i386)
            host_cpu_model=`sysctl -n hw.model`
            case "$host_cpu_model" in
                # Hmm.. this might not catch Celerons, but it won't hurt them either...
                *Pro*|*II*|*III*|*IV*|*Athlon*)
                    # architecture-specific optimizations cause problems
                    # for some users who build binaries to be used on
                    # multiple architectures.
                    # arch="-march=i686"
                ;;
            esac
            ;;

        *-i686)
                    # architecture-specific optimizations cause problems
                    # for some users who build binaries to be used on
                    # multiple architectures.
                    # arch="-march=i686"
            ;;
    esac

    case "$host_os-$host_cpu" in
        # cygwin needs the "-std=c99" flag removed, so make
        # a specific case for Cygwin without the flag and a default
        # case to add the flag everywhere else
        cygwin-*)
            ;;

        *)
            H5_CFLAGS="$H5_CFLAGS -std=c99"
            ;;
    esac

    H5_CFLAGS="$H5_CFLAGS $arch"

    ##############
    # Production #
    ##############

    # NDEBUG is handled explicitly by the configure script
    if test $cc_vers_major -le 4; then
        PROD_CFLAGS=
    else
        PROD_CFLAGS="-fstdarg-opt"
    fi

    #########
    # Debug #
    #########

    # NDEBUG is handled explicitly by the configure script
    # -g is handled by the symbols flags
    if test $cc_vers_major -le 4; then
        DEBUG_CFLAGS=
    else
        DEBUG_CFLAGS="-ftrapv -fno-common"
    fi

    ###########
    # Symbols #
    ###########

    NO_SYMBOLS_CFLAGS="-s"
    SYMBOLS_CFLAGS="-g -fno-omit-frame-pointer"

    #############
    # Profiling #
    #############

    PROFILE_CFLAGS="-pg"

    ################
    # Optimization #
    ################
    
    if test $cc_vers_major -le 4; then
        HIGH_OPT_CFLAGS="-O3"
        DEBUG_OPT_CFLAGS=
    else
        HIGH_OPT_CFLAGS="-O3"
        DEBUG_OPT_CFLAGS="-Og"
    fi
    NO_OPT_CFLAGS="-O0"

    ############
    # Warnings #
    ############

    ###########
    # General #
    ###########

    # Note that some of the flags listed here really should be developer
    # flags (listed in a separate variable, below) but we put them here
    # because they are not raised by the current code and we'd like to
    # know if they do start showing up.
    #
    # NOTE: Don't add -Wpadded here since we can't/won't fix the (many)
    # warnings that are emitted. If you need it, add it from the
    # environment variable at configure time.
    #
    # NOTE: Disable the -Wformat-nonliteral from -Wformat=2 here and re-add
    # it to the developer flags.
    #
    H5_CFLAGS="$H5_CFLAGS -pedantic -Wall -Wextra -Wbad-function-cast -Wc++-compat -Wcast-align"
    H5_CFLAGS="$H5_CFLAGS -Wcast-qual -Wconversion -Wdeclaration-after-statement -Wdisabled-optimization -Wfloat-equal"
    H5_CFLAGS="$H5_CFLAGS -Wformat=2 -Wno-format-nonliteral -Winit-self -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs"
    H5_CFLAGS="$H5_CFLAGS -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpacked"
    H5_CFLAGS="$H5_CFLAGS -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-enum -Wswitch-default"
    H5_CFLAGS="$H5_CFLAGS -Wundef -Wunused-macros -Wunsafe-loop-optimizations -Wwrite-strings"
    H5_CFLAGS="$H5_CFLAGS -Wlogical-op -Wlarger-than=2560"

    ######################
    # Developer warnings #
    ######################

    # (suggestions from gcc, not code problems)
    # NOTE: -Wformat-nonliteral added back in here (from being disabled in H5_CFLAGS)
    DEVELOPER_WARNING_CFLAGS="-Winline -Waggregate-return -Wmissing-format-attribute -Wmissing-noreturn -Wformat-nonliteral"
    NO_DEVELOPER_WARNING_CFLAGS="-Wno-inline -Wno-aggregate-return -Wno-missing-format-attribute -Wno-missing-noreturn"

    #######################
    # gcc 4 special cases #
    #######################

    # Disable warnings about using the 'long long' type w/ gcc 4.6 and earlier
    if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 2 -o $cc_vers_major -eq 4 -a $cc_vers_minor -le 6; then
        H5_CFLAGS="$H5_CFLAGS -Wno-long-long"
    fi

    # -Wstrict-aliasing was later incorporated into -Wall and
    # only needs to be specified explicitly for gcc 4.5-4.6
    if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -le 6; then
        H5_CFLAGS="$H5_CFLAGS -Wstrict-aliasing"
    fi

    # The non-valued form of -Wstrict-overflow is used in gcc 4.2-4.4
    if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 2 -o $cc_vers_major -eq 4 -a $cc_vers_minor -le 4; then
        H5_CFLAGS="$H5_CFLAGS -Wstrict-overflow"
    fi

    # -Wvla was later incorporated into -Wpedantic and
    # only needs to be specified explicitly for gcc 4
    if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 2; then
        H5_CFLAGS="$H5_CFLAGS -Wvla"
    fi

    #############################
    # Version-specific warnings #
    #############################

    # gcc 4.4
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 4; then
        H5_CFLAGS="$H5_CFLAGS -Wsync-nand -Wframe-larger-than=16384 -Wpacked-bitfield-compat"
    fi

    # gcc 4.5
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 5; then
        H5_CFLAGS="$H5_CFLAGS -Wstrict-overflow=5 -Wjump-misses-init -Wunsuffixed-float-constants"
    fi

    # gcc 4.6
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 6; then
        H5_CFLAGS="$H5_CFLAGS -Wdouble-promotion -Wtrampolines"
        DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=const"
        NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=const"
    fi

    # gcc 4.7
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 7; then
        H5_CFLAGS="$H5_CFLAGS -Wstack-usage=8192 -Wvector-operation-performance"
        DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=pure -Wsuggest-attribute=noreturn"
        NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=pure -Wno-suggest-attribute=noreturn"
    fi

    # gcc 4.8
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 8; then
        DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=format"
        NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=format"
    fi

    # gcc 4.9
    if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 9; then
        H5_CFLAGS="$H5_CFLAGS -Wdate-time"
    fi

    # gcc 5
    if test $cc_vers_major -ge 5; then
        H5_CFLAGS="$H5_CFLAGS -Warray-bounds=2 -Wc99-c11-compat"
    fi

    # gcc 6
    if test $cc_vers_major -ge 6; then
        H5_CFLAGS="$H5_CFLAGS -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa -Wnormalized"
    fi

    # gcc 7
    if test $cc_vers_major -ge 7; then
        DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wstringop-overflow=2"
        H5_CFLAGS="$H5_CFLAGS -Walloc-zero -Walloca -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=2 -Wimplicit-fallthrough=5 -Wrestrict"
    fi

    # gcc 8
    if test $cc_vers_major -ge 8; then
        DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wstringop-overflow=4 -Wsuggest-attribute=cold -Wsuggest-attribute=malloc"
        NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=cold -Wno-suggest-attribute=malloc"
        H5_CFLAGS="$H5_CFLAGS -Wattribute-alias -Wcast-align=strict -Wshift-overflow=2"
    fi

    # gcc 9
    if test $cc_vers_major -ge 9; then
        H5_CFLAGS="$H5_CFLAGS -Wattribute-alias=2 -Wmissing-profile"
    fi

    #################
    # Flags are set #
    #################
    cc_flags_set=yes
fi

# Clear cc info if no flags set
if test "X$cc_flags_set" = "X"; then
    cc_vendor=
    cc_version=
fi