在 64 位机器上安装 32 位 PBC 库

Question

我想为我的项目安装 PBC 库。在我的 64 位系统上，配置脚本很容易安装 64 位库。但我必须使用的代码是基于 32 位构建的。

我试过这个命令（来自question的答案）：

./configure --build=i686-pc-linux-gnu "CFLAGS=-m32" "CXXFLAGS=-m32" "LDFLAGS=-m32"

但是当我运行'make'时出现这个错误：

/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-field.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-z.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-naivefp.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-fastfp.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-fp.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-fasterfp.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-montfp.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-multiz.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-dlog.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-fieldquadratic.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-poly.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-random.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-init_random.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-darray.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-symtab.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-get_time.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-utils.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-memory.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-extend_printf.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-mpc.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-mnt.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-hilbert.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-curve.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-pairing.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-singular.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-param.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-a_param.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-d_param.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-e_param.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-f_param.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `.libs/libpbc_la-g_param.o' is incompatible with i386 output

“--help”列出了以下标志：

Some influential environment variables:
CC          C compiler command
CFLAGS      C compiler flags
LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a nonstandard directory <lib dir>
LIBS        libraries to pass to the linker, e.g. -l<library>
CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if you have headers in a nonstandard directory <include dir>
CPP         C preprocessor
Use these variables to override the choices made by `configure' or to help it to find libraries and programs with nonstandard names/locations.

Answer 1

首先，检查：

./configure --help

是否允许覆盖 CFALGS/LDFLAGS？

如果是，请按照帮助信息进行操作。 其次，通常，./configure 会生成 makefile，然后您发出“make”命令。 你说，你刚配置完就报这个错误？

如果你在 make 之后遇到这些错误，那么它 看起来 ld 正在与 old-residue 链接。

你试过了吗：

make clean;make

Answer 2

感谢@Icarus3。你为我指明了正确的方向。我使用的命令是：

./configure --build=i686-pc-linux-gnu "CFLAGS=-m32" "CXXFLAGS=-m32" "LDFLAGS=-m32"

我跑的时候

./configure --help

它没有CXXFLAGS。所以我把它改成了CPPFLAGS=-m32。它奏效了。