CentOs7下，Caffe環境安裝問題解決
準備在CentOS 7 下重新安裝Caffe，centos7很不錯，基本上官方文件裡的：
sudo yum install protobuf-devel leveldb-devel snappy-devel opencv-devel boost-devel hdf5-develsudo yum install gflags-devel glog-devel lmdb-develBLAS:
install ATLAS by sudo yum install atlas-devel or
install OpenBLAS or MKL for better CPU performance. For the Makefile build, uncomment and set
BLAS_LIB accordingly
as ATLAS is usually installed under /usr/lib[64]/atlas).安裝atlas-devel。
開始編譯~
make all
報錯：
[[email protected]**** caffe]# make allCXX/LD -o .build_release/tools/convert_imageset.bin
/bin/ld: cannot find -lcblas
/bin/ld: cannot find -latlas
collect2: error: ld returned 1 exit status
查了一下，是程式在我們配置的lib目錄裡找不到atlas的so檔案，比對了一下ld命令的查詢方式和我們已安裝的atlas：
ld -latlas --verbose
顯示查詢路徑如下：
==================================================
attempt to open /usr/x86_64-redhat-linux/lib64/libatlas.so failed
attempt to open /usr/x86_64-redhat-linux/lib64/libatlas.a failed
attempt to open /usr/lib64/libatlas.so failed
attempt to open /usr/lib64/libatlas.a failed
attempt to open /usr/local/lib64/libatlas.so failed
attempt to open /usr/local/lib64/libatlas.a failed
attempt to open /lib64/libatlas.so failed
attempt to open /lib64/libatlas.a failed
attempt to open /usr/x86_64-redhat-linux/lib/libatlas.so failed
attempt to open /usr/x86_64-redhat-linux/lib/libatlas.a failed
attempt to open /usr/local/lib/libatlas.so failed
attempt to open /usr/local/lib/libatlas.a failed
attempt to open /lib/libatlas.so failed
attempt to open /lib/libatlas.a failed
attempt to open /usr/lib/libatlas.so failed
attempt to open /usr/lib/libatlas.a failed
ld: cannot find -latlas
我看了一下我們安裝的atlas，在/usr/lib64/atlas/下，內有這些so：
[[email protected]*** caffe]# ll /usr/lib64/atlas
total 21304
lrwxrwxrwx 1 root root 17 Apr 6 04:38 libsatlas.so -> libsatlas.so.3.10
lrwxrwxrwx 1 root root 17 Mar 14 22:24 libsatlas.so.3 -> libsatlas.so.3.10
-rwxr-xr-x 1 root root 10852104 Nov 20 2015 libsatlas.so.3.10
lrwxrwxrwx 1 root root 17 Apr 6 04:38 libtatlas.so -> libtatlas.so.3.10
lrwxrwxrwx 1 root root 17 Mar 14 22:24 libtatlas.so.3 -> libtatlas.so.3.10
-rwxr-xr-x 1 root root 10959464 Nov 20 2015 libtatlas.so.3.10
我們安裝的atlas的so庫只有libsatlas和libtatlas兩種，與caffe要的完全不匹配。
查了一些材料（https://www.centos.org/forums/viewtopic.php?t=48543），這個提問裡有提到這個現象，在centOS7下，庫名已改，引入方式也要改變：
Names and content of atlas libraries have changed recently. Try
-L/usr/lib64/atlas -lsatlas or -L/usr/lib64/atlas -ltatlas
instead of
-lcblas.
但我並不想去修改caffe原始碼，擔心引起連鎖問題，且報錯中並沒有提示具體發生問題的檔案。
解決方案
改用openblas：
yum install openblas-devel
MakeFile.config配置如下：
BLAS := open
# Custom (MKL/ATLAS/OpenBLAS) include and lib directories.
# Leave commented to accept the defaults for your choice of BLAS
# (which should work)!
#BLAS_INCLUDE := /usr/include/atlas
#BLAS_LIB := /usr/lib64/atlas
後續一切成功。 done。
建議Caffe對CentOS 7 下atlas引用失敗的問題做修復。有空提個issue。