[MacPorts] #71707: libtool (GNU) hardcodes CC and LD

Wed Jan 1 15:01:12 UTC 2025

#71707: libtool (GNU) hardcodes CC and LD
--------------------------+---------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.5
 Keywords:                |       Port:  libtool
--------------------------+---------------------
 How is this even supposed to work correctly? `/opt/local/bin/glibtool` is
 a script, and it hardcodes a specific compiler, C standard and linker:
 {{{
 # ### BEGIN LIBTOOL CONFIG

 # Which release of libtool.m4 was used?
 macro_version=2.5.3
 macro_revision=2.5.3

 # Assembler program.
 AS="as"

 # DLL creation program.
 DLLTOOL="false"

 # Object dumper program.
 OBJDUMP="false"

 # Whether or not to build shared libraries.
 build_libtool_libs=yes

 # Whether or not to build static libraries.
 build_old_libs=yes

 # What type of objects to build.
 pic_mode=default

 # Whether or not to optimize for fast installation.
 fast_install=needless

 # Shared archive member basename,for filename based shared library
 versioning on AIX.
 shared_archive_member_spec=

 # Shell to use when invoking shell scripts.
 SHELL="/bin/sh"

 # An echo program that protects backslashes.
 ECHO="printf %s\\n"

 # The PATH separator for the build system.
 PATH_SEPARATOR=":"

 # The host system.
 host_alias=
 host=powerpc-apple-darwin10.8.0
 host_os=darwin10.8.0

 # The build system.
 build_alias=
 build=powerpc-apple-darwin10.8.0
 build_os=darwin10.8.0

 # A sed program that does not truncate output.
 SED="/usr/bin/sed"

 # Sed that helps us avoid accidentally triggering echo(1) options like -n.
 Xsed="$SED -e 1s/^X//"

 # A grep program that handles long lines.
 GREP="/usr/bin/grep"

 # An ERE matcher.
 EGREP="/usr/bin/grep -E"

 # A literal string matcher.
 FGREP="/usr/bin/grep -F"

 # A BSD- or MS-compatible name lister.
 NM="/usr/bin/nm -p"

 # Whether we need soft or hard links.
 LN_S="ln -s"

 # GNU M4.
 M4="/opt/local/bin/gm4"

 # What is the maximum length of a command?
 max_cmd_len=196608

 # Object file suffix (normally "o").
 objext=o

 # Executable file suffix (normally "").
 exeext=

 # whether the shell understands "unset".
 lt_unset=unset

 # turn spaces into newlines.
 SP2NL="tr \\040 \\012"

 # turn newlines into spaces.
 NL2SP="tr \\015\\012 \\040\\040"

 # convert $build file names to $host format.
 to_host_file_cmd=func_convert_file_noop

 # convert $build files to toolchain format.
 to_tool_file_cmd=func_convert_file_noop

 # A file(cmd) program that detects file types.
 FILECMD="file"

 # Method to check whether dependent libraries are shared objects.
 deplibs_check_method="pass_all"

 # Command to use when deplibs_check_method = "file_magic".
 file_magic_cmd="\$MAGIC_CMD"

 # How to find potential files when deplibs_check_method = "file_magic".
 file_magic_glob=""

 # Find potential files using nocaseglob when deplibs_check_method =
 "file_magic".
 want_nocaseglob="no"

 # Command to associate shared and link libraries.
 sharedlib_from_linklib_cmd="printf %s\\n"

 # The archiver.
 AR="ar"

 # Flags to create an archive (by configure).
 lt_ar_flags=cr

 # Flags to create an archive.
 AR_FLAGS=${ARFLAGS-"$lt_ar_flags"}

 # How to feed a file listing to the archiver.
 archiver_list_spec=""

 # A symbol stripping program.
 STRIP="strip"

 # Commands used to install an old-style archive.
 RANLIB="ranlib"
 old_postinstall_cmds="chmod 644 \$oldlib~\$RANLIB \$tool_oldlib"
 old_postuninstall_cmds=""

 # Whether to use a lock for old archive extraction.
 lock_old_archive_extraction=yes

 # A C compiler.
 LTCC="/usr/bin/gcc-4.2 -std=gnu99"

 # LTCC compiler flags.
 LTCFLAGS="-pipe -Os -arch ppc"

 # Take the output of nm and produce a listing of raw symbols and C names.
 global_symbol_pipe="/usr/bin/sed -n -e 's/^.*[
 ]\\([BCDEGRST][BCDEGRST]*\\)[   ][      ]*_\\([_A-Za-z][_A-
 Za-z0-9]*\\)\$/\\1 _\\2 \\2/p' | /usr/bin/sed '/ __gnu_lto/d'"

 # Transform the output of nm in a proper C declaration.
 global_symbol_to_cdecl="/usr/bin/sed -n -e 's/^T .* \\(.*\\)\$/extern int
 \\1();/p' -e 's/^[BCDEGRST][BCDEGRST]* .* \\(.*\\)\$/extern char \\1;/p'"

 # Transform the output of nm into a list of symbols to manually relocate.
 global_symbol_to_import=""

 # Transform the output of nm in a C name address pair.
 global_symbol_to_c_name_address="/usr/bin/sed -n -e 's/^: \\(.*\\) .*\$/
 {\"\\1\", (void *) 0},/p' -e 's/^[BCDEGRST][BCDEGRST]* .* \\(.*\\)\$/
 {\"\\1\", (void *) \\&\\1},/p'"

 # Transform the output of nm in a C name address pair when lib prefix is
 needed.
 global_symbol_to_c_name_address_lib_prefix="/usr/bin/sed -n -e 's/^:
 \\(.*\\) .*\$/  {\"\\1\", (void *) 0},/p' -e 's/^[BCDEGRST][BCDEGRST]* .*
 \\(lib.*\\)\$/  {\"\\1\", (void *) \\&\\1},/p' -e
 's/^[BCDEGRST][BCDEGRST]* .* \\(.*\\)\$/  {\"lib\\1\", (void *)
 \\&\\1},/p'"

 # The name lister interface.
 nm_interface="BSD nm"

 # Specify filename containing input files for $NM.
 nm_file_list_spec=""

 # The root where to search for dependent libraries,and where our libraries
 should be installed.
 lt_sysroot=

 # Command to truncate a binary pipe.
 lt_truncate_bin="/bin/dd bs=4096 count=1"

 # The name of the directory that contains temporary libtool files.
 objdir=.libs

 # Used to examine libraries when file_magic_cmd begins with "file".
 MAGIC_CMD=file

 # Must we lock files when doing compilation?
 need_locks="no"

 # Manifest tool.
 MANIFEST_TOOL=":"

 # Tool to manipulate archived DWARF debug symbol files on Mac OS X.
 DSYMUTIL="dsymutil"

 # Tool to change global to local symbols on Mac OS X.
 NMEDIT="nmedit"

 # Tool to manipulate fat objects and archives on Mac OS X.
 LIPO="lipo"

 # ldd/readelf like tool for Mach-O binaries on Mac OS X.
 OTOOL="otool"

 # ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4.
 OTOOL64=":"

 # Old archive suffix (normally "a").
 libext=a

 # Shared library suffix (normally ".so").
 shrext_cmds="\`test .\$module = .yes && echo .so || echo .dylib\`"

 # The commands to extract the exported symbol list from a shared archive.
 extract_expsyms_cmds=""

 # Variables whose values should be saved in libtool wrapper scripts and
 # restored at link time.
 variables_saved_for_relink="PATH DYLD_LIBRARY_PATH  GCC_EXEC_PREFIX
 COMPILER_PATH LIBRARY_PATH"

 # Do we need the "lib" prefix for modules?
 need_lib_prefix=no

 # Do we need a version for libraries?
 need_version=no

 # Library versioning type.
 version_type=darwin

 # Shared library runtime path variable.
 runpath_var=

 # Shared library path variable.
 shlibpath_var=DYLD_LIBRARY_PATH

 # Is shlibpath searched before the hard-coded library search path?
 shlibpath_overrides_runpath=yes

 # Format of library name prefix.
 libname_spec="lib\$name"

 # List of archive names.  First name is the real one, the rest are links.
 # The last name is the one that the linker finds with -lNAME
 library_names_spec="\$libname\$release\$major\$shared_ext
 \$libname\$shared_ext"

 # The coded name of the library, if different from the real name.
 soname_spec="\$libname\$release\$major\$shared_ext"

 # Permission mode override for installation of shared libraries.
 install_override_mode=""

 # Command to use after installation of a shared archive.
 postinstall_cmds=""

 # Command to use after uninstallation of a shared archive.
 postuninstall_cmds=""

 # Commands used to finish a libtool library installation in a directory.
 finish_cmds=""

 # As "finish_cmds", except a single script fragment to be evaled but
 # not shown.
 finish_eval=""

 # Whether we should hardcode library paths into libraries.
 hardcode_into_libs=no

 # Compile-time system search path for libraries.
 sys_lib_search_path_spec="/usr/lib/powerpc-apple-darwin10/4.2.1 /usr/lib
 /opt/local/lib /usr/lib/gcc/powerpc-apple-darwin10/4.2.1  /usr/local/lib"

 # Detected run-time system search path for libraries.
 sys_lib_dlsearch_path_spec="/usr/local/lib /lib /usr/lib"

 # Explicit LT_SYS_LIBRARY_PATH set during ./configure time.
 configure_time_lt_sys_library_path=""

 # Whether dlopen is supported.
 dlopen_support=yes

 # Whether dlopen of programs is supported.
 dlopen_self=yes

 # Whether dlopen of statically linked programs is supported.
 dlopen_self_static=yes

 # Commands to strip libraries.
 old_striplib="strip -S"
 striplib="strip -x"

 # The linker used to build libraries.
 LD="/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/ld"

 # How to create reloadable object files.
 reload_flag=" -r"
 reload_cmds="\$LTCC \$LTCFLAGS -nostdlib \$wl-r -o \$output\$reload_objs"

 # Commands used to build an old-style archive.
 old_archive_cmds="\$AR \$AR_FLAGS \$oldlib\$oldobjs~\$RANLIB
 \$tool_oldlib"

 # A language specific compiler.
 CC="/usr/bin/gcc-4.2 -std=gnu99"
 }}}

 (Please ignore 10.6 here, this is not the point, since 10.5 also uses
 gcc-4.2 by default.)

 I spent a lot of time trying to fix `tilde` port which has a number of
 dependencies, some of which require C++11, while others do not (therefore
 different compilers are used). All of those use `libtool` port (i.e., GNU
 `libtool`).

 And look what the build does, after I patched out `--silent` flag:
 {{{
 --->  Building libt3config
 Executing:  cd
 "/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_devel_libt3config/libt3config/work/libt3config-1.0.0"
 && /usr/bin/make -j6 -w all
 make: Entering directory
 `/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_devel_libt3config/libt3config/work/libt3config-1.0.0'
 [CCLT] src/xdg.c
 [CCLT] src/write.c
 [CCLT] src/schema.c
 [CCLT] src/parser.c
 [CCLT] src/lex.c
 [CCLT] src/pathsearch.c
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/write.c  -fno-common -DPIC -o src/.libs/write.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/pathsearch.c  -fno-common -DPIC -o src/.libs/pathsearch.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/schema.c  -fno-common -DPIC -o src/.libs/schema.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/lex.c  -fno-common -DPIC -o src/.libs/lex.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/xdg.c  -fno-common -DPIC -o src/.libs/xdg.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/parser.c  -fno-common -DPIC -o src/.libs/parser.o
 [CCLT] src/config.c
 [CCLT] src/util.c
 [CCLT] src/expression.c
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/config.c  -fno-common -DPIC -o src/.libs/config.o
 [CCLT] src/config_shared.c
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/util.c  -fno-common -DPIC -o src/.libs/util.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/expression.c  -fno-common -DPIC -o src/.libs/expression.o
 glibtool: compile:  /opt/local/bin/gcc-mp-14 -pipe -Os -arch ppc
 -DHAS_STRDUP -DHAS_USELOCALE -DUSE_XLOCALE_H -Isrc -DT3_CONFIG_BUILD_DSO
 -c src/config_shared.c  -fno-common -DPIC -o src/.libs/config_shared.o
 [LDLT] src/libt3config.la
 glibtool: link: /usr/bin/gcc-4.2 -std=gnu99 -dynamiclib -Wl,-undefined
 -Wl,dynamic_lookup -o src/.libs/libt3config.0.dylib  src/.libs/xdg.o
 src/.libs/write.o src/.libs/pathsearch.o src/.libs/parser.o
 src/.libs/lex.o src/.libs/schema.o src/.libs/config.o src/.libs/util.o
 src/.libs/expression.o src/.libs/config_shared.o   -L/opt/local/lib  -Os
 -arch ppc -Wl,-headerpad_max_install_names -arch ppc   -install_name
 /opt/local/lib/libt3config.0.dylib -compatibility_version 1
 -current_version 1.1 -Wl,-single_module
 glibtool: link: (cd "src/.libs" && rm -f "libt3config.dylib" && ln -s
 "libt3config.0.dylib" "libt3config.dylib")
 glibtool: link: ( cd "src/.libs" && rm -f "libt3config.la" && ln -s
 "../libt3config.la" "libt3config.la" )
 make: Leaving directory
 `/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_devel_libt3config/libt3config/work/libt3config-1.0.0'
 }}}
 Here I tried to blacklist `gcc-4.2` to get the port built with `gcc14`. It
 does not work correctly, so no surprise everything is screwed in result:
 linking is always done with the old Xcode gcc, regardless of the compiler
 chosen by MacPorts.

 I do not see anything in `libt3config` source to hardcode what is used for
 linking. This probably comes from `libtool` itself.

-- 
Ticket URL: <https://trac.macports.org/ticket/71707>
MacPorts <https://www.macports.org/>
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