编译iPIC3D时出现HDF5库compress2等函数未定义引用错误

Hey there, let's break down what's causing those linker errors and get your iPIC3D build working smoothly.

Root Cause 1: Missing Zlib Dependency #

The errors you're seeing (undefined reference to compress2, inflateInit_, etc.) all point to a missing zlib dependency. Zlib is a compression library that HDF5 relies on for its deflate compression functionality—since your HDF5 build includes this feature (the default for most installations), the linker needs explicit access to zlib's libraries to resolve these symbols. Your current LDLIBS configuration doesn't include zlib, so the linker can't find these required functions.

Root Cause 2: Typo in Include Path #

Looking at your main target in the Makefile, there's a typo: -I$(INC_HDF6) should be -I$(INC_HDF5). While this isn't causing the current linker error, it will lead to header file resolution issues down the line, so we'll fix that too.

Modified Makefile Sections #

Here's how to update your Makefile to resolve both issues:

1. Update LDLIBS to Include Zlib #

Add -lz (the zlib linker flag) to the end of your LDLIBS line:

LDLIBS = $(IPIC3D_LIB) $(H5HUTIO_LIB) $(H5HUT_LIB) $(HDF5_LIB) -ldl -lz

2. Fix the Include Path Typo #

Correct the compile line in the main target:

main : iPic3D.o
	$(CXX) $(LDFLAGS) -I$(INC_DIR) -I$(INC_HDF5) iPic3D.cpp -o $(IPIC3D_EXE) $(LDLIBS)

Extra Verification Step #

To confirm your HDF5 build requires zlib, run this command to check HDF5's default linker flags:

$(HDF5_HOME)/bin/h5cc -show

You should see -lz in the output, which confirms zlib is a required dependency for your HDF5 installation.

After making these changes, run make clean followed by make to rebuild from scratch—this should fully resolve the linker errors.

内容的提问来源于stack exchange，提问作者noobprogrammer