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Commit8e5e3ff

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Don't put library-supplied -L/-I switches before user-supplied ones.
For many optional libraries, we extract the -L and -l switches neededto link the library from a helper program such as llvm-config. Insome cases we put the resulting -L switches into LDFLAGS ahead of-L switches specified via --with-libraries. That risks breakingthe user's intention for --with-libraries.It's not such a problem if the library's -L switch points to adirectory containing only that library, but on some platforms alibrary helper may "helpfully" offer a switch such as -L/usr/libthat points to a directory holding all standard libraries. If theuser specified --with-libraries in hopes of overriding the standardbuild of some library, the -L/usr/lib switch prevents that fromhappening since it will come before the user-specified directory.To fix, avoid inserting these switches directly into LDFLAGS duringconfigure, instead adding them to LIBDIRS or SHLIB_LINK. They willstill eventually get added to LDFLAGS, but only after the switchescoming from --with-libraries.The same problem exists for -I switches: those coming from--with-includes should appear before any coming from helper programssuch as llvm-config. We have not heard field complaints about thiscase, but it seems certain that a user attempting to override astandard library could have issues.The changes for this go well beyond configure itself, however,because many Makefiles have occasion to manipulate CPPFLAGS toinsert locally-desirable -I switches, and some of them got it wrong.The correct ordering is any -I switches pointing at within-the-source-tree-or-build-tree directories, then those from the tree-wideCPPFLAGS, then those from helper programs. There were several placesthat risked pulling in a system-supplied copy of libpq headers, forexample, instead of the in-tree files. (Commitcb36f8e fixed oneinstance of that a few months ago, but this exercise found more.)The Meson build scripts may or may not have any comparable problems,but I'll leave it to someone else to investigate that.Reported-by: Charles Samborski <demurgos@demurgos.net>Author: Tom Lane <tgl@sss.pgh.pa.us>Discussion:https://postgr.es/m/70f2155f-27ca-4534-b33d-7750e20633d7@demurgos.netBackpatch-through: 13
1 parentd5f014d commit8e5e3ff

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12 files changed

+33
-33
lines changed

12 files changed

+33
-33
lines changed

‎config/llvm.m4‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@
44
# -----------------
55
#
66
# Look for the LLVM installation, check that it's new enough, set the
7-
# corresponding LLVM_{CFLAGS,CXXFLAGS,BINPATH} and LDFLAGS
7+
# corresponding LLVM_{CFLAGS,CXXFLAGS,BINPATH,LIBS}
88
# variables. Also verify that CLANG is available, to transform C
99
# into bitcode.
1010
#
@@ -55,7 +55,7 @@ AC_DEFUN([PGAC_LLVM_SUPPORT],
5555
5656
for pgac_option in `$LLVM_CONFIG --ldflags`; do
5757
case $pgac_option in
58-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
58+
-L*)LLVM_LIBS="$LLVM_LIBS $pgac_option";;
5959
esac
6060
done
6161

‎config/programs.m4‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -290,8 +290,8 @@ AC_DEFUN([PGAC_CHECK_LIBCURL],
290290
pgac_save_LDFLAGS=$LDFLAGS
291291
pgac_save_LIBS=$LIBS
292292
293-
CPPFLAGS="$LIBCURL_CPPFLAGS $CPPFLAGS"
294-
LDFLAGS="$LIBCURL_LDFLAGS $LDFLAGS"
293+
CPPFLAGS="$CPPFLAGS $LIBCURL_CPPFLAGS"
294+
LDFLAGS="$LDFLAGS $LIBCURL_LDFLAGS"
295295
296296
AC_CHECK_HEADER(curl/curl.h,[],
297297
[AC_MSG_ERROR([header file <curl/curl.h> is required for --with-libcurl])])

‎configure‎

Lines changed: 12 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -5194,7 +5194,7 @@ fi
51945194

51955195
for pgac_option in `$LLVM_CONFIG --ldflags`; do
51965196
case $pgac_option in
5197-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
5197+
-L*)LLVM_LIBS="$LLVM_LIBS $pgac_option";;
51985198
esac
51995199
done
52005200

@@ -9436,12 +9436,12 @@ fi
94369436
# Note the user could also set XML2_CFLAGS/XML2_LIBS directly
94379437
for pgac_option in $XML2_CFLAGS; do
94389438
case $pgac_option in
9439-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
9439+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
94409440
esac
94419441
done
94429442
for pgac_option in $XML2_LIBS; do
94439443
case $pgac_option in
9444-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
9444+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
94459445
esac
94469446
done
94479447
fi
@@ -9666,12 +9666,12 @@ fi
96669666
# note that -llz4 will be added by AC_CHECK_LIB below.
96679667
for pgac_option in $LZ4_CFLAGS; do
96689668
case $pgac_option in
9669-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
9669+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
96709670
esac
96719671
done
96729672
for pgac_option in $LZ4_LIBS; do
96739673
case $pgac_option in
9674-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
9674+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
96759675
esac
96769676
done
96779677
fi
@@ -9807,12 +9807,12 @@ fi
98079807
# note that -lzstd will be added by AC_CHECK_LIB below.
98089808
for pgac_option in $ZSTD_CFLAGS; do
98099809
case $pgac_option in
9810-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
9810+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
98119811
esac
98129812
done
98139813
for pgac_option in $ZSTD_LIBS; do
98149814
case $pgac_option in
9815-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
9815+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
98169816
esac
98179817
done
98189818
fi
@@ -12723,8 +12723,8 @@ if test "$with_libcurl" = yes ; then
1272312723
pgac_save_LDFLAGS=$LDFLAGS
1272412724
pgac_save_LIBS=$LIBS
1272512725

12726-
CPPFLAGS="$LIBCURL_CPPFLAGS $CPPFLAGS"
12727-
LDFLAGS="$LIBCURL_LDFLAGS $LDFLAGS"
12726+
CPPFLAGS="$CPPFLAGS $LIBCURL_CPPFLAGS"
12727+
LDFLAGS="$LDFLAGS $LIBCURL_LDFLAGS"
1272812728

1272912729
ac_fn_c_check_header_mongrel "$LINENO" "curl/curl.h" "ac_cv_header_curl_curl_h" "$ac_includes_default"
1273012730
if test "x$ac_cv_header_curl_curl_h" = xyes; then :
@@ -16658,7 +16658,7 @@ fi
1665816658

1665916659
if test "$with_icu" = yes; then
1666016660
ac_save_CPPFLAGS=$CPPFLAGS
16661-
CPPFLAGS="$ICU_CFLAGS $CPPFLAGS"
16661+
CPPFLAGS="$CPPFLAGS $ICU_CFLAGS"
1666216662

1666316663
# Verify we have ICU's header files
1666416664
ac_fn_c_check_header_mongrel "$LINENO" "unicode/ucol.h" "ac_cv_header_unicode_ucol_h" "$ac_includes_default"
@@ -18876,7 +18876,7 @@ Use --without-tcl to disable building PL/Tcl." "$LINENO" 5
1887618876
fi
1887718877
# now that we have TCL_INCLUDE_SPEC, we can check for <tcl.h>
1887818878
ac_save_CPPFLAGS=$CPPFLAGS
18879-
CPPFLAGS="$TCL_INCLUDE_SPEC $CPPFLAGS"
18879+
CPPFLAGS="$CPPFLAGS $TCL_INCLUDE_SPEC"
1888018880
ac_fn_c_check_header_mongrel "$LINENO" "tcl.h" "ac_cv_header_tcl_h" "$ac_includes_default"
1888118881
if test "x$ac_cv_header_tcl_h" = xyes; then :
1888218882

@@ -18945,7 +18945,7 @@ fi
1894518945
# check for <Python.h>
1894618946
if test "$with_python" = yes; then
1894718947
ac_save_CPPFLAGS=$CPPFLAGS
18948-
CPPFLAGS="$python_includespec $CPPFLAGS"
18948+
CPPFLAGS="$CPPFLAGS $python_includespec"
1894918949
ac_fn_c_check_header_mongrel "$LINENO" "Python.h" "ac_cv_header_Python_h" "$ac_includes_default"
1895018950
if test "x$ac_cv_header_Python_h" = xyes; then :
1895118951

‎configure.ac‎

Lines changed: 9 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -1103,12 +1103,12 @@ if test "$with_libxml" = yes ; then
11031103
# Note the user could also set XML2_CFLAGS/XML2_LIBS directly
11041104
for pgac_option in $XML2_CFLAGS; do
11051105
case $pgac_option in
1106-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
1106+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
11071107
esac
11081108
done
11091109
for pgac_option in $XML2_LIBS; do
11101110
case $pgac_option in
1111-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
1111+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
11121112
esac
11131113
done
11141114
fi
@@ -1152,12 +1152,12 @@ if test "$with_lz4" = yes; then
11521152
# note that -llz4 will be added by AC_CHECK_LIB below.
11531153
for pgac_option in $LZ4_CFLAGS; do
11541154
case $pgac_option in
1155-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
1155+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
11561156
esac
11571157
done
11581158
for pgac_option in $LZ4_LIBS; do
11591159
case $pgac_option in
1160-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
1160+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
11611161
esac
11621162
done
11631163
fi
@@ -1177,12 +1177,12 @@ if test "$with_zstd" = yes; then
11771177
# note that -lzstd will be added by AC_CHECK_LIB below.
11781178
for pgac_option in $ZSTD_CFLAGS; do
11791179
case $pgac_option in
1180-
-I*|-D*)CPPFLAGS="$CPPFLAGS $pgac_option";;
1180+
-I*|-D*)INCLUDES="$INCLUDES $pgac_option";;
11811181
esac
11821182
done
11831183
for pgac_option in $ZSTD_LIBS; do
11841184
case $pgac_option in
1185-
-L*)LDFLAGS="$LDFLAGS $pgac_option";;
1185+
-L*)LIBDIRS="$LIBDIRS $pgac_option";;
11861186
esac
11871187
done
11881188
fi
@@ -1944,7 +1944,7 @@ fi
19441944

19451945
if test "$with_icu" = yes; then
19461946
ac_save_CPPFLAGS=$CPPFLAGS
1947-
CPPFLAGS="$ICU_CFLAGS $CPPFLAGS"
1947+
CPPFLAGS="$CPPFLAGS $ICU_CFLAGS"
19481948

19491949
# Verify we have ICU's header files
19501950
AC_CHECK_HEADER(unicode/ucol.h,[],
@@ -2344,7 +2344,7 @@ Use --without-tcl to disable building PL/Tcl.])
23442344
fi
23452345
# now that we have TCL_INCLUDE_SPEC, we can check for <tcl.h>
23462346
ac_save_CPPFLAGS=$CPPFLAGS
2347-
CPPFLAGS="$TCL_INCLUDE_SPEC $CPPFLAGS"
2347+
CPPFLAGS="$CPPFLAGS $TCL_INCLUDE_SPEC"
23482348
AC_CHECK_HEADER(tcl.h,[],[AC_MSG_ERROR([header file <tcl.h> is required for Tcl])])
23492349
CPPFLAGS=$ac_save_CPPFLAGS
23502350
fi
@@ -2381,7 +2381,7 @@ fi
23812381
# check for <Python.h>
23822382
if test "$with_python" = yes; then
23832383
ac_save_CPPFLAGS=$CPPFLAGS
2384-
CPPFLAGS="$python_includespec $CPPFLAGS"
2384+
CPPFLAGS="$CPPFLAGS $python_includespec"
23852385
AC_CHECK_HEADER(Python.h,[],[AC_MSG_ERROR([header file <Python.h> is required for Python])])
23862386
CPPFLAGS=$ac_save_CPPFLAGS
23872387
fi

‎src/Makefile.global.in‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -254,7 +254,7 @@ CPP = @CPP@
254254
CPPFLAGS = @CPPFLAGS@
255255
PG_SYSROOT = @PG_SYSROOT@
256256

257-
overrideCPPFLAGS:=$(ICU_CFLAGS)$(LIBNUMA_CFLAGS)$(LIBURING_CFLAGS)$(CPPFLAGS)
257+
overrideCPPFLAGS+=$(ICU_CFLAGS)$(LIBNUMA_CFLAGS)$(LIBURING_CFLAGS)
258258

259259
ifdefPGXS
260260
overrideCPPFLAGS := -I$(includedir_server) -I$(includedir_internal)$(CPPFLAGS)

‎src/backend/jit/llvm/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -31,7 +31,7 @@ endif
3131
# All files in this directory use LLVM.
3232
CFLAGS +=$(LLVM_CFLAGS)
3333
CXXFLAGS +=$(LLVM_CXXFLAGS)
34-
overrideCPPFLAGS:=$(LLVM_CPPFLAGS)$(CPPFLAGS)
34+
overrideCPPFLAGS+=$(LLVM_CPPFLAGS)
3535
SHLIB_LINK +=$(LLVM_LIBS)
3636

3737
# Because this module includes C++ files, we need to use a C++

‎src/bin/initdb/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -20,7 +20,7 @@ include $(top_builddir)/src/Makefile.global
2020
# from libpq, else we have risks of version skew if we run with a libpq
2121
# shared library from a different PG version. Define
2222
# USE_PRIVATE_ENCODING_FUNCS to ensure that that happens.
23-
overrideCPPFLAGS := -DUSE_PRIVATE_ENCODING_FUNCS -I$(libpq_srcdir) -I$(top_srcdir)/src/timezone$(ICU_CFLAGS)$(CPPFLAGS)
23+
overrideCPPFLAGS := -DUSE_PRIVATE_ENCODING_FUNCS -I$(libpq_srcdir) -I$(top_srcdir)/src/timezone$(CPPFLAGS)$(ICU_CFLAGS)
2424

2525
# We need libpq only because fe_utils does.
2626
LDFLAGS_INTERNAL += -L$(top_builddir)/src/fe_utils -lpgfeutils$(libpq_pgport)$(ICU_LIBS)

‎src/common/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -163,7 +163,7 @@ libpgcommon_shlib.a: $(OBJS_SHLIB)
163163
# The JSON API normally exits on out-of-memory; disable that behavior for shared
164164
# library builds. This requires libpq's pqexpbuffer.h.
165165
jsonapi_shlib.o: override CPPFLAGS += -DJSONAPI_USE_PQEXPBUFFER
166-
jsonapi_shlib.o: override CPPFLAGS+= -I$(libpq_srcdir)
166+
jsonapi_shlib.o: override CPPFLAGS:= -I$(libpq_srcdir)$(CPPFLAGS)
167167

168168
# Because this uses its own compilation rule, it doesn't use the
169169
# dependency tracking logic from Makefile.global. To make sure that

‎src/interfaces/libpq-oauth/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -24,7 +24,7 @@ NAME = pq-oauth-$(MAJORVERSION)
2424
overrideshlib := lib$(NAME)$(DLSUFFIX)
2525
overridestlib := libpq-oauth.a
2626

27-
overrideCPPFLAGS := -I$(libpq_srcdir) -I$(top_builddir)/src/port$(LIBCURL_CPPFLAGS)$(CPPFLAGS)
27+
overrideCPPFLAGS := -I$(libpq_srcdir) -I$(top_builddir)/src/port$(CPPFLAGS)$(LIBCURL_CPPFLAGS)
2828

2929
OBJS =\
3030
$(WIN32RES)

‎src/interfaces/libpq/Makefile‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -24,7 +24,7 @@ NAME= pq
2424
SO_MAJOR_VERSION= 5
2525
SO_MINOR_VERSION=$(MAJORVERSION)
2626

27-
overrideCPPFLAGS :=-I$(srcdir)$(CPPFLAGS)-I$(top_builddir)/src/port -I$(top_srcdir)/src/port
27+
overrideCPPFLAGS := -I$(srcdir) -I$(top_builddir)/src/port -I$(top_srcdir)/src/port$(CPPFLAGS)
2828
ifneq ($(PORTNAME), win32)
2929
overrideCFLAGS +=$(PTHREAD_CFLAGS)
3030
endif

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